6l80e no forward gears after rebuild Will still get up to 45 though but shifting is erradict and seems to slip alot. Jul 28, 2023 · Experienced mechanic installed it for me and after install there is a lound clunk noise when you put it into reverse, smoother going down to drive but it doesn't move. 8 4x4 that is giving me some issues. Design and Features. Reverse works perfectly. Here is the gear ratio of the 6L80E automatic transmission: First gear — 4. If they are dragging it is too tight and will eventually cause problems. Then blew the line off. Jun 12, 2017 · My 2010 with 174k was shifting great and then forward gears randomly went out. Interestingly enough, Lorenzo Ortiz from Phillips Transmissions had a 2016 6L80 come into his shop with a no forward but good reverse complaint from the customer. I have the 8 speed in the colorado, after the fluid flush it has been solid. Transmission Repair Tip: How to Use Small Drill Bits with a Portable Drill Motor. July 28, 2023. No leaks. Get a scan tool on that thing and see what you have in the TCM to start with. Fluid full, clean, no burnt smell 2011, LT 5. "if you have no speedo, the trans wont shift through the forward gears. Jun 4, 2020 · The 6l90e is a different length and also has a different output shaft versus the 6l80e. Reverse works fine, but no forward gears at all. Complete fluid change out done personally ~70k miles ago with GM fluid. Apr 17, 2022 · I do recall there being some issues with a shudder on the Ford variant, haven't heard much on the GM one. 2L, just replaced the engine with a core I rebuilt from ebay. 364; Third gear Jul 8, 2023 · Now I no longer have the stability control alarm and dash light, that is clear. Sure enough, #1 check ball had blown through the separator plate. They both contacted me on the same day with the same question: What would cause a “no-move” forward or reverse after the rebuild? 6L80-E Transmission - No Forward - No Trouble Codes - Transmission Repair Oct 21, 2016 · The 6L80/90E transmission consists of five clutch sets (1234, 35R, 456, 26 and LR), a planetary set, and a low clutch sprag, which provides six forward gears and reverse. Symptoms are a slight flare into third, and a harsh 5th gear engagement, especially at fluid temps below 135 degrees. Jump to Latest if hypothetically the 3/5/r is cracked I get how I would have little or no forward or reverse, as the most recent 2015 Chevy Silverado 5. From the attachments below, Ive cut them to show 1-2, 2-3 and 3-4 changes, the 2-3 shows the spikes I'm on about, I've logged as may parameters as possible. It's our houses third vehicle, doesn't get driven much (today was my monthly happy to drive the full size to work day) and has shuddered and lurched small amounts in the past but this showed up with no warning. After rebuild there was a hesitation in the engagement of 1st gear when going into D. Would kind of 'catch' under some acceleration. compete rebuild. When sitting in the drop off line at school for 15seconds and I let off the brake to go forward the car initially moves a small amount and then something happens and it?s like the brakes are applied however I think the transmission is the culprit not the Mar 14, 2014 · 6l80e will engage into R, but not D V8 and V6 Transmissions / Driveline (6L80 / 6L50 / TR6060 / AY6) It was reasonably close, but still no forward gears, only Mar 3, 2020 · The billet covers are almost 1/4 inch thicker in the clutch surface area than the OE cover as shown in figure 3. I'll probably end up making my own set if I cant scrounge them up at work. 5K views 18 replies 3 participants last post by Vwking2 Feb 21, 2022 why do the 6l80e's somtimes develope a flare shift after a re-program,, even just a minor change in shift speed or wot change will cause a light throttle flare shift only in D mode,, 2 L99 camaro's one had a flare 2-3 shift only in D with light throttle (fine in sport mode) , did a tech2 fast re-learn, didnt fix it,, finally left the batt disconnected over night and it was fixed the other car May 31, 2023 · Hi All, I'm brand new here but active on other GM forums where the 6L transmissions are actively being discussed so figured I'd start a similar all-encompassing transmission thread with videos, links and other information as it relates to the 6L80/90 transmissions. Feb 16, 2013 · Well, the install did not cost me anything. Dealership never would change the filter so the first time it acted funny it actually sounded like a hydraulic pump starving for fluid. Thanks Aug 17, 2023 · A quick video on 3-5-R clutch failure and to demonstrate air check procedures to confirm or deny the drum's base welds are responsible for burn-up of the 3-5 Apr 6, 2013 · Hi all, I have a 2011 Suburban 1500 LTZ 4x4 with 178 K on it. Matt Feb 27, 2007 · Let me start from the begining. With GM’s 6L80 being out on the road for the past 15 years, they are coming into the shops more frequently. 2014 taho 4x4. Early versions of this transmission are known to develop cracks in the 1234 piston and sometimes in the piston itself. Oct 11, 2023 · If no forward movement, the problem is inside the case. To complete the Transmission Adaptive Values Learn procedure enter GDS 2 Diagnosis and navigate to:– Module diagnostics– Transmission Control Module– Configuration / Reset Function– Transmission Adaptive Values Learn Jun 24, 2020 · I can't think of any electrical faults that would cause no forward gears at all. 3L 4x4 Avy Recently flushed transmission with new fluid at 340,000kms 370,000kms currently Jan 25, 2023 · Hey everyone, got another problem with my 6L80. Electrical faults outside the transmission probably not. Dec 28, 2017 · I tried to shut it off and restart a few times strong reverse but no real forward gear. The 6L80 transmission, developed by General Motors, is a versatile gearbox used in a variety of vehicles. 6L80E Transmission Gear Ratios. Billet Circle D converter, a few billet pieces and whatever new internals were needed. Aug 1, 2023 · The complaint A 2017 Hyundai Elantra equipped with an A6GF1 transmission has a complaint of slipping in second gear and setting DTC P0732. PCM and TCM reprogrammed. Mar 3, 2020 · Recently, I had a call about a 6L80 that gave me a serious case of bewilderment. Never noticed any slipping. Plug it back in, binds after 10 feet or so, instantly if I give it gas. Fluid still looks and smells good. March 08, 2023. Dec 29, 2014 · Going down the road all the sudden I have no forward or reverse gears exactly like mychevz71. After tranny reset and going through several, 15-20 mild accelerations where the tranny learns to shift properly, which it did, after this it is shifting like brand new. When installed upside down, the input carrier will drop right over the sun gear, spin in place and feel normal for the most part. I have reverse but no forward gears. The problem will usually be remedied and back to normal, simple as that. 3. If replacing an 8L45 or 8L90 valve body, make certain to not install a stop-start valve body on a non-stop-start transmission/vehicle. 5 qts. Leo330; Apr 9, 2024; 700r4 no 4th gear after warmup. Changed Double shift solenoid (still no 4th gear) 3. 3 4x4 6l80 about 150k 160k. GM 6L45/50, 6L80/90 No Movement Conditions: Analysis & Repair Tips . problem it had when it came in was no forward gears but had reverse. long story short I did the rebuild drained the pan and changed the filter put everything back together started the truck and went to put it in gear and now have nothing. Unplug harness, neutral is a solid forward gear (1st or 2nd?) And D feels like 3rd or 4th. Jan 14, 2021 · The 6L80 and 6L90 transmissions have become the most popular rear-wheel drive GM transmissions in most of our shops. Installed the rebuilt transmission and still no reverse. Out of nowhere. Jul 1, 2009 · Clutch, Transmission, Differential, Axle & Transfer Case - 4r70w no 3rd or 4th gear after rebuild - i just rebuilt a 2000 4r70w. It's right there. a very large pair of snap ring pliers is the only specialty tool that is 80% necessary. Oct 13, 2023 · By now, most major shops have had enough exposure to 6L80 transmissions to realize that they will be around for quite some time, providing plenty of work. I replaced the 7 check balls and added the 8th, replaced separator plate and reinstalled everything. My friend owns the transmission shop and they installed it for free for me. Mar 30, 2018 · As time goes by, we see more and more of these 6L80s showing up at the door. The truck is in good shape overall and its done we Jun 1, 2022 · Hey folks, my 2010 5. My 2014 6l80 4wd transmission went bad at 165,000 miles. Apr 1, 2020 · You verify the no forward or reverse gears. a hydraulic pressurization and control system. Tried reverse with no luck. Customer: 2009 gmc denali 6l80e transmission Does 8 check ball spacer plate fit this car Orginaliy 7 check ball After rebuild it no forward moving Answered by Richard Zabka in 28 mins 1 year ago Richard Zabka If you have a GM Truck or Van with a 6-speed transmission, built after 2006, these issues are likely to affect your truck. Got it back from the shop in April, but worked literally every day since May 10th, so just now got to troubleshooting it. this really sucks if the transmission is going Jan 29, 2024 · I have a 2017 with a 2. 3L 2009 Chevy Tahoe which is a 6 speed, with a used 6. Put it in the truck, ran in all forward gears (felt the shifts and took it for a test drive), but had no reverse. It barely moves in 1st 2nd then when it gets up to speed 3rd 4th and 5th gear is sluggish. 00 Programming at dealer 150. 027; Second gear — 2. . I had the transmission rebuilt @ 232000 miles and it currently has 297000, so 65k on rebuilt tranny. I’m looking for a little advice. The problem is the owner says it doesn't have reverse, but will go forward any day. I have a 15 Yukon Denali with the 6. Any suggestions would be greatly appreciated! Thanks for your time. Freeze transmission adaptive functions. Oct 26, 2024 · It is full of fluid, and had warmed up to 145. This condition may be present in more than one forward gear or if the condition is bad enough, it may result in a no movement forward condition. In simple terms, the 6L50, 6L80, 6L90, 6T70, 6T75, 6T80 all use the same design TEHCM. Feb 24, 2022 · After getting my 07 Silverado trans rebuilt, it worked until it drank all the fluids, and after refilling the fluids, it began to function again. New valvoline atf +4 was used 5. Dec 28, 2017 · my sons 1970 has a 2011 5. 6L80, 6L90 Remanufactured TEHCMs for Top-Quality, Affordable Repairs. after 6l80 overhaul 2000 miles later neutrals at stop. If I rev the engine to 3k rpm through a parking lot and let off the gas, the transmission feels like it drops out of gear and goes back to idle. 00 for a total of 1080. It seems to sit a little Jan 13, 2025 · I just swapped my transmission in a 5. Jun 3, 2015 · Unlike some older transmission designs, the 6L80/90 applications also apply the Low Reverse (L/R) clutch to aid the low sprag during take-off. Keep us posted - this is an unusual problem compared to what I usually see. Apr 6, 2011 · I don't feel the tranny trying to engage when I put it in any forward gear, but when I put it in reverse from any other gear, I do feel the gears engage, even from reverse to a forward gear to reverse. he backed it out of the shop and put it in drive and nothing but a small roll forward. Apr 1, 2011 · What they have in common is working on the 6L80/6L90 for the first time. Fluid level is good. Got to a stop sign and it wouldn't move at all. If the sprag develops a problem, the L/R clutch will hold the output carrier initially. With a micromanagement level of control in play comes Mar 9, 2004 · With the electronics in the 6l80 it works with the engine to momentarily pull back on the fuel during shifts to preserve the transmission. Literally hit a regular bump in the road and felt like the truck went into neutral. The transition from second to third was flawless. The hydraulic system primarily consists of a vane-type pump, two control valve bodies, a converter housing, and a case. 00 plus tax of 142. Jun 5, 2020 · From a recent Automatic Transmission Service Group (ATSG) Online Technical Bulletin:When the GM 6L80/90 transmission presents with a complaint of no forward or reverse movement, or slipping badly in all ranges, initial inspection may reveal a cracked or split sump filter (see Figure 1). Two planetary gear sets provide the six forward gear ratios and reverse. He thinks it's an electrical issue, I'm not sure. 6L 45/6L 80 is a compact, hi-tech and reliable transmission, which features an automatic control over most of gearbox functions. Brought it to a trans shop I trust and TSB 00-07-30-022D – No reverse, second or fourth gears – 4L60E Transmission & 4L65E Transmission 1993 – 2005 GM passenger cars and light duty trucks Problem – Drivers may experience the loss of reverse, second and fourth gears. It's actually a very simple transmission, the only special tool I needed was the snap ring pliers. Important: When installing a new 1-2-3-4 / 3-5-R Apr 17, 2017 · I got this 2000 4l80e tranny in after a rebuild of the owner saying there is a very soft movement forward and reverse if the selector in OD. It was designed for both AWD/4WD and RWD General Motors applications. Backed out of the driveway just fine, drove down the road just fine, but would not shift into 3rd. I recently rebuilt mine with quality upgrade parts. 6L80 is good, torque converter not. I will check for codes and report back. An internal fault with shift solenoid # 2 looks like it could cause no forward gears if the truck does have a 6L80. Thanks in advance. Is a 2wd 4l60e inside a 1996 Jun 20, 2017 · Alright guys, so after driving the truck around during the weekends, seeing if she gets torn up, I finally decided to dig into the transmission. I drive all the time with my shift box so I can hold any gear I need for as long as I want. Mar 8, 2023 · 1-2-3-4 Clutch regulator valve stuck, no Forward. I took it for a test drive after installing it and it wouldn't go into 3rd. I went home and tried resetting it by shifting from N to D for 5 seconds then to R for 5 seconds and did it 20 times. The 1-2-3-4 clutch regulator valve issue is usually discovered after the repair/reinstall. There is a cross leak Aug 6, 2024 · Commanded gear = 1st Gear; Transmission Input Speed = Greater than 150 RPM; Transmission Output Speed = Greater than 100 RPM; If P2724 is set the TCM will: Request reduced engine torque based on transmission input speed. For my first time doing it alone it wasn't too bad. Plug it back in, neutral has forward motion if throttled, D is solid. GEARSMAGAZINE. Apr 21, 2019 · My wife ran over to the corner store in our 2010 4WD 5. Tranny sat about 3 years before current state. Command maximum line pressure. For shits and giggles after 5 minutes or so I turned it back on and all the gears were Jan 20, 2020 · I have been having problems with my 6L80 transmission. 3l 6l80e trans,84,000 miles and all of a sudden tack went to 0 and i put trans in neutral costed off hwy, shut off went to restart nothing but lights not even a click try to jump just click, but new battery in just a click very faint, did not have code reader with me so bought a starter but in in hooked up battery, started right up, shut off but everything May 2, 2010 · This is my first 4L60E rebuild so I'm still learning the trans of course *yay*. Problem is, when I put it in reverse, it goes forward. Cracks in the 1-2-3-4 piston . Clutch regulator valves can be confusing and easily missed. Sep 21, 2013 · The 48RE already has 4 clutches in the forward and 5 in the direct, there is no clearance issues running 4 clutches that needs to be worried about. Jun 24, 2021 · You are so deep in; you no longer can see the obvious. "Does this mean the display console is out?, what do i need to do to verify it? Do I have to replace the whole display console $$? Information about rebuild transmission GM 6L45 /50, 6L80 /90. You also aren't dealing with 30 year old fatigued parts. Long story short, old transmission is shot, new transmission that was a fresh build, will not engage any forward gears. 3 Vortec transplanted in a 57 Chevy truck. Started with intermittent unlocking/locking of transmission from a stop. 88 Core Charge 1000. I did a lot of research and found sonnex made a pressure switch rebuild kit. Oh well. Jun 29, 2024 · Left me stranded at a traffic light. Next test is to accelerate slightly harder and let the tranny learn again. Dec 12, 2022 · Sonnax offers drop-in pressure regulator and shuttle valve kit 154740-02K for the OE lineup in instances of worn valves/sleeve/casting. First is a shrunk down #1 checkball and the 2nd is a cra In this video, i go over 2 very Nov 1, 2013 · Cause # 2: When the transmission was disassembled, the input carrier was found to be installed upside down onto the 1-2-3-4/3-5 Reverse Housing. On disassembly for a rebuild, the technician found there was water contamination that caused damage to the pistons, seals, and clutch frictions. Oct 22, 2023 · Long but detailed post. Pretty sure I have communication because gears shows up on Dakota gauges. This is one of the worst situations for you and the customer. Although, the problems with the 6L80 are usually consistent. Changing gear ratios is fully automatic and is accomplished through the use of a Transmission Control Module (TCM), that is located within the transmission. it provides a seal around the 32 spline output of the transmission so even if you remove your transfer case, no ATF leaks from the transmission. General Motors originally manufactured this transmission. May 31, 2009 · Good evening all! I'm crossposting this from another forum as I've seen a lot of transmission questions answered here. Jul 13, 2022 · Figured I’d ask here before I start pulling it. Didn't go backwards 4l60e no shift attempt to 3rd after rebuild. Aug 19, 2021 · Problem - My Avy went into a neutral like condition and rev'd up with no forward gears but the reverse still works. new 1-2-3 drum converter pump Mar 27, 2015 · A full rebuild on a 6l80 looks completely do-able. Related Articles – BendPak announces upgraded two-post parking lift – Alto offers GM 6L80E/6L90E 4-5-6 clutch PowerPack – Alto introduces GM 6L80E, 6L90E Red Eagle piston kit The TorCon 6L80 is compatible with 2007-2020 GM trucks, Jun 5, 2020 · From a recent Automatic Transmission Service Group (ATSG) Online Technical Bulletin:When the GM 6L80/90 transmission presents with a complaint of no forward or reverse movement, or slipping badly in all ranges, initial inspection may reveal a cracked or split sump filter (see Figure 1). Since it was just rebuilt, Mike decided to do a quick line pressure check as it was easy enough to do. They also said GM sells the entire drum as an assembly ready to set in, as rebuilding the old drum has proven very unsuccessful. Patterned failures for this unit have been covered in previous editions of GEARS magazine, but there is more to let you know! Realizing that not all transmission builders Reaching out into the HPTuners universe for help and guidance regarding some electronic trans nonsense. suddenly lost all acceleration on the highway, got it to my shop, I’ve got no gears, not in manual, 4wd, reverse forward truck will not move under its own power, I scanned it, it was throwing p-2732 (solenoid 5 stuck open) I did a hard reset (negative to positive battery terminals) and nothing changed except that it won’t throw the code now Dec 7, 2018 · 2011 6l80 an 5. We got it back to the house and let it sit for 20 minutes and it's still not working. After a little research on the ole' interwebs I found that the 6L80E has a problem with a plastic check ball in the valve body shrinks and gets stuck in the plate. Nov 1, 2015 · Have a 2011 6l80 with 179k. Never noticed any slipping gears previously. It does start to move forward but like a idle only no difference if you give it fuel. The TCM receives and monitors various electronic No disrespect here but if you are capable of working urself the 6l80e is actually pretty simple. If you aren't sure which Sonnax GM 6L80, 6L90 4-5-6 upgrades are right for your transmission build, this video breaks down all the options. 9 transmission has an after-overhaul complaint of no forward movement. A&B solenoids are brand new. If it moves forward (it will be in third gear which is the only gear you will have so dont try to drive it on the street), that tells me electrical/command and control is the problem. Jun 19, 2019 · I'm finishing up a L92 and 6L80E swap in my buggy, and prepping for a shakedown run. Transmission lost 3rd gear (continued to drive) 4. I recently had my 6l80e transmission rebuilt after losing reverse. This improves both acceleration performance and fuel economy. Replacing the clutches in an automatic transmission is not a job that is easily done whatsoever. My transmission blew while on a trip to PA, so I went and got it with a trailer. Turned out the media filter was pretty clogged with metal particulate. Related Articles – BendPak announces upgraded two-post parking lift – Alto offers GM 6L80E/6L90E 4-5-6 clutch PowerPack – Alto introduces GM 6L80E, 6L90E Red Eagle piston kit The TorCon 6L80 is compatible with 2007-2020 GM trucks, Nov 23, 2011 · Unplugged harness, reverse is fine, no bind. No reverse, no forward. Three clutches are applied to attain each gear except P/N. Dec 2, 2021 · Today’s drivetrains are more efficient than ever before. Fixing the no drive / forward gear condition on this 2018 chevrolet silverado transmission. Original problem was 3-4 gear was out. Nov 17, 2023 · This procedure is completed in the service stall and no vehicle driving is required. Jun 13, 2020 · About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright The 6L80 transmission had a design change to the 1-2-3-4 piston, 1-2-3-4 piston housing and the 3-5-R piston for the 2008 model year. forward clutch pack was toast and the seal was blown out. 3 Sierra and when she came out, it would not shift into any forward gears. So basically, from what I'm getting about your post, it's most likely either a PCM/electric issue or the input gear on the rear planetary set. Jun 1, 2019 · Without that rear internal ring gear there is no forward movement. It's original problem was reverse gear went out on it and during the tear down the forward clutch discs were extremely worn and a couple even fused with the steels. What is going on? Apr 5, 2022 · At this point, you are probably wondering what all the different symptoms and transmission applications have in common. We have about 10 quarts of fluid in the trans at this point. Apr 1, 2011 · This prevented the 1-2-3-4 housing splines from engaging the input carrier and resulted in no movement, forward or reverse. 3L 4x4 210xxx miles No check engine codes Transmission is a 3KCD No previous issues with transmission. While coasting, I switched to manual mode and cycled through gears with no luck, also tried going between neutral and drive with no luck. About the same came out. The build: I snagged a 120k mile 6L80 locally on Ebay from a wrecked 08' Hummer H2 for $675. Then put into drive and the same thing? What could be the problem. Only symptoms 2 days earlier were bucking into gear when cruising 5to10mph. Randomly slammed out of 4th, wouldn't upshift, and eventually I lost all gears. When I removed the trans I noticed the electrical connector was FULL of fluid. com Nov 17, 2023 · I get no errors on my scan tool, I have no forward gears at all. Car is on a lift still with no weight on the tires. The early first design valve body had a direct feed from the #5 shuttle ball to the #7 metering check ball as seen in figures 1 (above), 2 and 3. Inhibit grade braking. Inspected Valve Body, looked for broken snap ring on O/D and installed new 3rd gear accumulator (still no 3rd or 4th gear) 5. Quick Rundown: 2008 Colorado - Full Tube Chassis - Custom Everything - Big Tires - Big Axles - Rock Crawler Gen7 BBC - 8. Dec 27, 2021 · So i drove my wife 2015 silverado 4. I found this out as the trans started slipping. all the pistons were in good shape, no cracks or anything. Become an ATSG member now to access all of the Confirmed Fix videos, GEARS Online Buyers Guide • Search by specific category for quick website links to the suppliers of our industry. I'm not a transmission guy, so am at a loss on what to do. Dec 30, 2020 · Mike from Transmission Unlimited dealt with an interesting example of this when a 2012 Dodge Caravan came in with a no-move condition. Afterward, my forward gear stopped working and I could only shift in reverse, moving forward is possible, but only at 3-4k rpm. 3 with the 6L80E had no forward motion so I dropped the pan and pulled the valve body. Before they even checked line pressures, they told me that is a common problem with the 6l80e and it stems from a cracked piston in the "multi" gear clutch drum. I finally threw a code and it was solenoid 3 was stuck open. May 31, 2022 · The application use of the 6L80 transmission has been extensive over the years. Powertrain management computers control the engine, transmission, and related systems to prevent wasting fuel. And the rebuild was uneventful, you will also need a dial indicator setup for checking clearances, you can do this mechanically or with low pressure air, I chose mechanically, I needed to google this to fully grasp what needed to happen, once understood it was straight forward and an important QA step that verified Jan 9, 2014 · That seal is a really nice feature of the 6L80. took the truck for a Nov 23, 2011 · Unplugged harness, reverse is fine, no bind. Fluid full. As transmission builders, always request billet covers on your 6L80/90 converters. Sep 23, 2014 · After installation, the unit worked at first, but suddenly lost Forward, then after a few more minutes, it lost Reverse. I get a delayed engagement of reverse. P0796 transmission pres Feb 24, 2021 · Transmission control modules on the 6L80 and 6L90 and mounted on the valve body, and have to be programed to the truck. Because of this, it uses a mode or range switch to determine what gear is selected instead of the manual valve. 1L Vortec Motor - Holley Terminator engine management - Runs great 2008 Escalade - 6L80 Transmission - TCM2650 Transmission Controller - Not So Great currently. Best of luck! Oct 22, 2021 · Schaeffler announced the debut of the LuK TorCon 6L80 torque converter, which the company notes is all-new and not remanufactured. Both were doing repairs; one had installed updated seals for an intermittent 2-3 flare, and the other installed an upgraded clutch pack. Inhibit neutral idle. In this video, i go over 2 very common problems with the 6L80E that would cause no forward movement. it started slipping from a dead stop. 3 2-wheel Dr. The bell housing was replaced and the pump was rebuilt as Jan 31, 2020 · 2010 6L80e rebuild no reverse. The parts in the 6l80 are also bigger than older transmissions. RShrimp; Oct 11, 2019 · The 8L90/8L45 transmissions utilize five clutches to provide eight forward ratios and one reverse gear. Almost every 6L80 that shows up is either a converter failure, plugged filter, burnt 4-5-6 clutch, or a damaged stator and bell. It supports both rear-wheel drive (RWD) and all-wheel/four-wheel drive (AWD/4WD) systems. I dropped pan to take out TCM and extremely clean. com The Industry’s Information Site GEARS FOR THE TRANSMISSION REBUILDING INDUSTRY TM Figure 2: 3-5 reverse leak 6l80 Figure 3: 6l80 3-5 rev bearing 20garrett. The fluid revealed a badly burnt 62TE transmission. Transmission re-manufacturers like Street Smart Transmission will install an updated 6L80 1234 piston and housing to properly correct the problem. Park/Reverse/Neutral all work fine. 00 Tow charge 50. Dec 4, 2021 · Shifted great after the temporary fix. after driving home in the snow last night it first started. Car pan and Filter. The billet cover will resist flexing after welding and bring the converter back to OE specs for proper converter height. If not for the mechanical parking pawl, the transmission could be operated completely over CAN, from gear selection (PRND) to gear shifting. The truck was still driveable going forward so i got it back to the house fixed the problem with a coupler still no reverse. After rebuilding I reset adapts and tuned using Bluecat Trans tool and disabled TCC apply in 1-3. Every component is designed to maximize the transfer of power with the minimum amount of waste while maximizing the driver’s comfort and overall experience. Other than that's it's stock. the brake switch controls the brake lights and also unlocks the torque converter when brakes are applied. Now that the engine is running great, it's glaringly obvious the trans is on it's last leg. I used a CDT level 2 rebuild kit, CTS-V 6L90 TC, zip kit, new pump cover and bell housing, etc. As you can see but I can't find anything, that I know which isn't much, out of the ordinary. Originally my torque converter gave out at 113k and the debris ended up killing the front pump. Is the Fast Relearn all that I need to do after rebuilding a 6L80e? Vehicle is a 2012 Camaro SS, stock trans rebuild, stock converter and I'm unclear if I need to send it somewhere to reflash or if I can get away with just doing the Fast Relearn or another procedure in HP Tuners. However, filter quality may not be the underlying issue. Reverse felt like Nuetral. Sep 18, 2017 · Instead of rebuilding it, I pulled a low mileage 6L80 from a 2013 Silverado 1500 and even though it was in good shape, I put new frictions and steels in, as well as resealed the areas this transmission was prone to having issues with (the one way seals on the input shaft and valvebody) I knew the transmission control module would be the hardest Oct 11, 2024 · Overview of the 6L80 Transmission. Oct 29, 2024 · 6l90 6l90e rebuild transmission. Not to say the 6l80 can't or won't break but it holds up pretty well. Problem – Trucks equipped with the 6-speed 6L80 or 6L90 transmission may experience no forward or reverse engagement, or slipping between the gears. New filter was used. The 6l80 in the tahoe has the same BS shudder the 8 speed in my truck did but because there is no service bulletin for it GM laughed at me. After rebuild, the original complaint was still present even after Nov 10, 2015 · Greetings, I'm new to the GM world, Ford and Dodge guy. It was still moving in forward and reverse when it was towed to a local reputable transmission specialist. Doesn't attempt to move the tires any. 2L 2007 Gmc yukon 6 speed transmission, now I don't get the gear shift indicator on the instrument cluster, and not showing manual transmission gears when I shift into manual, I was wondering if I get the May 29, 2011 · Test A-Can i put the car up on all 4's, and detach the cable form the selector switch, then manually work through the gears. We have seen several patterned failures, written numerous articles, and found countless fixes to keep these units on the road (and the list doesn’t end). I also added 10% to the TCC apply ramp. Many thanks go to Max Dease from Kings Transmissions willing to share this unfortunate experience with us. i thought maybe the brake switch on the pedal was faulty. Part 2 to this video will be uploaded very shortly after this vid The 6L80 uses fewer parts and switched almost all the control to electrical. As a result, it doesn’t have the usual direct 1:1 ratio like the 4L60E and 4L80E transmissions. I am looking at getting a 2009 GM Ambulance with the 6. GM has the torque converter programmed to lock yet slip in lower torque conditions, in every forward gear. If you touch the accelerator, the speedo will still rise and fall. Then Sep 16, 2020 · Hopefully this will help some people that may experience this sudden loss of drive in their GM pickemup. Installation of a 2008, 6L80 complete housing assembly into a 2007 or older 6L80 may result in a 2-3 shift flare or 3-5-R clutch distress. Nov 11, 2022 · I recently had my 2016 Silverado's 6L80 (4wd) rebuilt and something went very wrong last night. Let me explain before you get upset and rip this page out of the magazine. P-park R-Forward N-Forward D-Forward M-Forward I recently dropped and replaced the valve body to remove the TCM. 1-2-3-4 Slip Condition, Possible No movement Forward CONCERN: 6L80/6L90 (RPO MYC, MYD) applications built before June of 2010 may exhibit a slip condition related to the operation of the 1 -2-3-4 clutch. 2010 Silverado ext LT Z71 5. There is a lot that can get messed up in the 4L60E. 6 LMM Duramax with a 6L80E transmission. Lastly, while the transmission is out, its a good time to have the rear main seal replaced too. Although that is a tough act to follow considering how many 4L60-Es were manufactured from 1993 to 2013. Its advanced computer controller plays a crucial role in managing gear shifts. It's exactly like it was in neutral. Reverse works. Feb 23, 2008 · After 4l60e rebuild, put 2000 Suburban in reverse and it stalled, had to rev up gas to move. The rebuilt transmission did not even make it 100 miles and it’s back at the shop. Dec 15, 2020 · 170,000 miles on my 14 Sierra 4wd 5. May 7, 2024 · My truck is a 2001 F-250 7. Customer: Just installed a rebuilt 6l80 transmission in my 2013 silverado and there is no reverse or 3rd gear. The 3-5-R clutch regulator valve is also known to stick and cause no Reverse and shift complaints. I tried manual shifting and no change No codes. I tried to run it through the manual gears (1-6) and it never grabbed. The case can flex, the clutch wears unevenly, then the transmission gets ruined by the clutch material pumped through it. CEL P0140,2160,&2270. If a no-movement condition is experienced after a fast learn or J2534 programming procedure is performed, remove the key from ignition, get out of the vehicle, shut the doors and return 15 minutes later. 8, and the transmission started giving me trouble. Unlike forward gears, reverse work just fine. A competant transmission shop can make the 80 as strong as the 90, you just have to tell them what you want it to do. 3 6 speed I am green when it comes to tuning, but have a fairly good understanding of mechanics. High Performance Product Line Manager Gregg Nader explains the different levels of clutch capacity available for stock/HD commercial and lightly modded street/strip performance vehicles all the way up to extreme racers. 88 for total of $1928. May 22, 2023. Oct 22, 2021 · Schaeffler announced the debut of the LuK TorCon 6L80 torque converter, which the company notes is all-new and not remanufactured. I have to rev up the engine to about 1700 rpm and the reverse gear will engage and spin just fine. Dec 3, 2015 · To add to the No reverse, my first gear is slipping only when I let off the gas pedal. My trans builder is relocating to a new bigger shop and is out of pocket for a few days. It reminds me of how often we used to see 4L60Es. Installed new convertor, flywheel, sunshell and rebuild kit. 2 shops told me to Rebuild/Replace. I just finished rebuilding my 6L80 after a converter failure tore up my old pump at ~130k. Apr 5, 2017 · There is a giant rubber O-ring around the piston that will shrink due to heat and age. The 6L80 has unique operations, such as an advanced computer controller constructed into the valve body and a direct clutch to clutch shifting. I suspect the wild quotes you got are from shops that know they can't handle these transmissions so they sub them out to the nearest dealer and pad the bill. Aug 10, 2013 · Part 3 The piston installs of these two were fairly easy with the seal ez kit. The transmission cost are as follows: GM 6l80e from dealer 1786. May 7, 2023 · 2003 Suburban LT 5. Dealers and some of the better independants shops can do this. The 6L80E automatic transmission makes use of 4 underdrive gears as well as two overdrive gears. Condition 4: Wrong Valve Body. If the Dec 17, 2021 · One of the more significant changes made to the valve body for 6L80 series transmission is related to the 3-5-R clutch feed. With these applications, when making a gear change a clutch is typically going to be released while another clutch will be applying, allowing the unit to achieve the desired ratio. This is better than many other automatics which rely on the transfer case or rear driveshaft to seal the output housing. The gearbox Apr 17, 2016 · When a GM 6L80/90 transmission finds its way into your shop with a complaint of no forward or reverse movement, or is slipping badly in all ranges, initial inspection may reveal a cracked or split sump filter (see Figure 1). everything went together with no problems. Gauge cluster has Feb 1, 2022 · Freshly Rebuilt 68rfe no forward gears Jump to Latest 5. 4L60E has forward gears, but no reverse Apr 24, 2024 · Truck didn't go forward. Car will not move forward in drive but it will move backwards in reverse. Related Articles – Shift Pointers: A building alternative for the AS69RC – Identifying GM 6T70 TEHCM generations using VIN and RPO codes – Shift Pointers: Bolt size matters in transmission repair The cause The B2 Oct 13, 2022 · This is like a Zen and the art of motorcycle maint question. Now after the transmission is warmed up and driven about 10 miles I have another problem. First of all, a 'cliff notes' since this may get long: Had transmission rebuilt, installed it, car has slightly slugish shifts through the Drive gears, but DOES shift, however I have no reverse. 2. Rebuilt Valve Body with Sonnex upgrades to it and O/D accumulator (still no 3rd or 4th gear) 6. So I took the servo pin out. Should I put the early estimated 5-7 k into a trans rebuild or get rid of it ? It is at an Aamco dealer now waiting for a diagnosis. How to Easily Remove & Replace a 6L80, 6L90 Output Planetary Lube Dam. indd 21 11/18/11 3:06 PM Jan 7, 2009 · The transmission in my Yukon. Jim Mobley. Recently rebuilt 6L80(clutches, steels, bearings, pistons, seals, zip kit, cooler thermal bypass, and torque coveter). I have 2019 Silverado with a 6L80. Mar 1, 2019 · The complaint A 2007 Mercedes-Benz CLS550 with the 722. But if the selector is in 3 or 2 or 1 it has full movement and drivable, ones rolling and put the selector in OD it shifts corect trough all gears exept reverse becouse you have to stop to shift reverse. Figure 3 shows the input-carrier splines that need to engage the 1-2-3-4 housing. You find out later after the disassembly that the pump gears are broken and welded to the metal plate in the pump. Pulled over, Shut it off started checking everything making sure wasn't leaking or anything obvious. They are beginning to take the place of the 4L60-E transmission. 3 Aluminum LC9 with a 6L80E transmission. Dec 20, 2023 · If the TEHCM passes all tests and the valve body / plate passes all tests, no anomalies noted then there's something wrong inside the case and a tear down is required to diagnose but since you were able to move forward in limp (3rd gear when trans is in gears 1-3 and 5th gear if the problem happens at highway speeds while in gears 4-6) the case Nov 14, 2020 · The 6L80E torque converter in my 2014 started letting go after ~146k, about 2k after the 3rd fluid change. After the rebuild, they still had a no-move condition. I fix the line again everything i thought was good and the trans had no reverse. No speedo display. Pulled over and checked trans temp, around 145. I owe about 10K on it and the trans just went out. The Service Fast Learn (SFL) process with the scanner would abort halfway through the process. No forward gear this morning after driving it into town and dropping off the kid. The 6L80 (RPO MYC), 6L90 (RPO MYD) may exhibit any of the following symptoms: • No forward or slips when moving forward • Neutrals on the 1-2 shift, then the transmission goes into 2nd gear • Possible P0756 may be set • The conditions may be intermittent in nature and may or may not have developed after a repair. Pulled over, put it in park, back into gear, no movement forward, or in reverse, acts as though it’s in neutral. The whole trans was rebuilt by an experienced transmission builder with a standard rebuild kit. I understand that this is not always the case but it Mar 3, 2024 · Thank you for watching the ATSG Confirmed Fix video covering 6L80: No Forward Movement. The 6L80 Nov 15, 2015 · Hey all, I have my 2000 Silverado 1500 4. See full list on transmissiondigest. I replaced the check balls in valve body Feb 3, 2020 · Customer concern of check engine light on after truck started to slip and studder was reving in drive now wont go forward or reverse. Mack told me he rebuilt this transmission, did all his normal procedures, and this transmission would bind up slightly, about two seconds after the first shift into third. Occasionally it felt like the transmission was in neutral and the engine can rev with no engagement and then suddenly it would drop into gear. It was rebuilt after the TC went out and ran fine for 750-1000 miles or so. Mar 19, 2023 · 2. Moves forward when #19 fuse is removed. In fact, I had to drive it home backwards in reverse. 00 Nov 27, 2023 · After about 10 minutes of driving like this I fully lost gear and went into a false neutral type situation. First sign of any issue was no forward gears after towing a 7k trailer for 3 hours, backing into a campsite and then trying to pull forward. I rebuilt the tranny because of no 2nd gear (band was toast, along with reverse hub), then installed a TRANSGO kit. Feb 12, 2022 · yes you hit the nail right on the head that is exactly what mine is doing. 00 Plus tax of 80. I turned it on, no reverse or forward. Watch the full 6L80 and 6L90 The sensation when you select change gear, revs stay steady for 1/2 sec (flaring) where not much happens, then you can physically feel the gear change. Nearly everyone is going to have to take it on in for a rebuild. Dec 15, 2022 · Condition 1: No movement after fast learn or programming. Solution – This problem could be caused by a cracked or split transmission filter. wzm pfnsw jewbf kawy idxt mty tzxqzfi mdgldoc vjudk glqdhg

6l80e no forward gears after rebuild. Car is on a lift still with no weight on the tires.