2015 6l80 transmission problems I cannot figure it out. Oct 19, 2023 · Okay, been reading here, found one thread that has a similar issue but didn't want to hijack, so here's what I have: 2015 GMC 6L80. Dec 14, 2024 · Hi all, as everyone knows GM has had a range of troublesome transmissions with problems that ranged from shuddering, slipping, hard shift, delayed shift, downshift bumps, etc. 0 (6L90), 2015-2019 GMC Sierra 2500HD/3500HD 6. The transmission was bad so I rebuilt it changing the clutches as they were shot. I was wanting to know if this transmission needs to be reprogrammed ,flashed or relearned . Common issues include: Power loss during acceleration; Reduced fuel efficiency; Potential complete transmission failure; Diagnostic Codes. By understanding these problems and their fixes, you’ll be better equipped to handle them. 3. 6 L8T (6L90), 2020-present. GMC Sierra 2500HD/3500HD 6. It supports both rear-wheel drive (RWD) and all-wheel/four-wheel drive (AWD/4WD) systems. Looking for some guidance on our 2015 GMC Yukon SLT. Here are a few items to check before getting too far into a diagnostic procedure: Transmission fluid level too high or too low; Wrong fluid type Jun 24, 2021 · With 6L80 transmissions having TCC issues, the TCC Reg valve in the valve body is usually looked at first. this really sucks if the transmission is going How good is the 6L80 transmission? In response to the question ‘how reliable is the 6L80 transmission?’, the answer partly depends on how well the transmission is maintained. 140k-ish miles, 5. 3 with the 6L80 transmission. About 110,000 miles on it. i thought maybe the brake switch on the pedal was faulty. Mar 9, 2023 · Since so many of us own at least one Tahoe or Yukon equipped with a 6L80, I figured I'd start an all-encompassing transmission thread with videos, links and other information as it relates to the 6L80/90 transmissions. May 31, 2022 · What Are Some of the Common Issues with 6L80 Transmission? The 6L80 has had a load of transmission problems, some of which directly inhibit drivability. General Motors lawsuit. Technicians often see codes for: Pressure control circuit Feb 12, 2022 · yes you hit the nail right on the head that is exactly what mine is doing. I changed torque converter also but not sure if the one I put it was any better than the last as it was used. The 6L80 Mar 16, 2023 · The complaint A 2015 Ford F250 equipped with the 6R140W transmission has just been overhauled. Shortly after the transmission has begun to develop forward and reverse engagement problems when the transmission is cold. I'll get it going with a tear down and inspection video and go from there. Dec 20, 2024 · Hello! New member and first time poster. Truck is slipping but was not slipping prior to changing clutches. Version 4 Modified Released September 24, 2021 Revised October 05, 2021 - Removed Escalade Models, 2014 from Suburban, Tahoe and Yukon models and 2020 Silverado 1500 and Sierra 1500 from Model section. Both were fixed under warranty and I never had any further problems with them whatsoever. A number of 6L80 transmission problems can occur however, including slipping and failure of reverse gear. In this Drivetrain 101, we’ll analyze all of its most prolific problems, solutions and upgrades. So just over a year ago we started experiencing the dreaded shudder around 1500-2000 rpm. The 6L80 transmission, developed by General Motors, is a versatile gearbox used in a variety of vehicles. v. I did an online search to see if others were having the same issue as I had not yet heard about the ongoing problems with this transmission. Common Causes of 6L80 / 6L90 TEHCM Problems Feb 16, 2024 · GM Transmission Issues Class Action Lawsuit Update If you purchased a new or used GM vehicle with a defective 8-speed transmission that was manufactured between 2015/2019 in California, Connecticut, Indiana, Iowa, Massachusetts, Missouri, North Dakota, Oregon, Rhode Island, and South Dakota, you could join the Ulrich, et al. Design and Features. And obviously there is a reason that causes this to happen but is there an in depth reasoning as to why each problem occurs? Apr 17, 2022 · The Problem of having “Delayed Forward and Delayed Reverse” in the 6L80 Transmissions may NOT just be a Problem with Malfunctioning TEHCM Switches, but may also involve LEAKS from Damaged Switch Films. Knowing diagnostic codes is vital for finding GM 6l80 transmission problems. As it warms towards operating temperature, the engagement problems diminish and are gone until the next cool-down period. after driving home in the snow last night it first started. Oct 11, 2024 · Overview of the 6L80 Transmission. Which other GM vehicles have this transmission? A few of the high-power LS sports cars, including: Chevrolet Corvette, 2006-2013 Chevrolet Camaro, 2010-2015 Chevrolet Camaro ZL1 (6L90), 2012-2015. While the 6L80 used four pinion gears, the 6L90 utilized six, invariably strengthening the input gear set; how did GM actualize this? GM used a longer transmission case, 35mm longer than the 6L80 case. 6L80 / 6L90 transmission fluid temperature sensor 6L80 / 6L90 TCM. Its advanced computer controller plays a crucial role in managing gear shifts. 2 and the 8 speed 8L90 transmission. com Apr 17, 2022 · The Problem of having “Delayed Forward and Delayed Reverse” in the 6L80 Transmissions may NOT just be a Problem with Malfunctioning TEHCM Switches, but may also involve LEAKS from Damaged Switch Films. 6 hr *This is a unique Labor Operation for Bulletin use only. From a 13 silverado. 3L. I bought new. So Replacing TEHCM may NOT actually be Necessary! Part 1: The Basics of the TEHCM Switch Film Problems: Oct 13, 2023 · Today’s engines put out ample torque and horsepower to move just about any load; however, if the vehicle is overloaded, you cannot solve an overheating problem in the transmission. Does your GM need Transmission Work? Contact us Nov 2, 2024 · If you own a GM vehicle with a 6-speed transmission, you’re likely familiar with common problems like slipping, shifting issues, or strange noises. Dec 19, 2024 · I have a 6L80 transmission in a 2015 Silverado 4. For a long while I just assumed it was a mis-fire or bad injectors or something. Mar 8, 2023 · Learn common causes and diagnostic repair tips for 6L45, 6L50, 6L80, 6L90 transmission problems like no Forward, no Reverse and the abnormal pressure condition. Last week: Driving home, noticed my RPM's were higher than they should be at 45 mph, like 2200 or so. May 31, 2023 · The upside w/this situation is that we can eliminate an entire class of suspects since you just rebuilt the transmission, replacing problem-prone parts (pump, 3-5-R drum, 1-2-3-4 piston, lip seals, sealing rings, etc) with brand new/updated ones so it's highly unlikely your problem is in the transmission case. Transmission 0. Feb 26, 2025 · GM 6l80 transmission problems can really hurt your car’s performance. It's the 5. Revised October 19,2021 - Removed 2014 and 2015 Silverado and Jan 27, 2022 · have a 13 tahoe transmission went out installed a used 6l80 . May 16, 2018 · I've had two transmission fail in brand new GM cars over the years. Technicians often see codes for: Pressure control circuit . 6L80 / 6L90 solenoid failure 6L80 / 6L90 pressure control switch failure 6L80 / 6L90 torque converter engagement and disengagement problems Slipping Unusually harsh shifts Failed shifts Loss of gears Limp mode. These problems are more than just annoying—they could indicate serious issues. 6L80 / 6L90 TEHCM Problems. Some of the most common issues include: Cracks in the 1-2-3-4 Pistons. the brake switch controls the brake lights and also unlocks the torque converter when brakes are applied. Everything seemed to be working good however after you go over 40 then come to a stop it feels like somone is rear ending you. If this is OK, the decision must be made to inspect the TEHCM or pull the unit and look at the turbine shaft O-ring, the PR valve, the TCC control valve, and converter limit valve in the pump. For more information on 6L80 transmission problems, click here. Apr 21, 2019 · The problem turned out to be a deformed check ball in the valve body plate. Right above the oil pan in your transmission is the valve body, which has the TCM connected to it on these trucks. I always run in M, so I can change Mar 31, 2020 · GM 6L80 and 6L90 units are now starting to reach their prime age in the repair cycle, and techs across the country are starting to see a consistent pattern of transmission failures with full-size 6L80, 6L90 vehicles. And obviously there is a reason that causes this to happen but is there an in depth reasoning as to why each problem occurs? See full list on chevyideas. Before 19,000 miles I got the shudder. Before I did this project, I had never opened a transmission in any way so I'm going to explain it in detail for a layman like me. Become a 6L80-E transmission expert now! The GM 6L90 transmission featured 75 percent of the parts used in the 6L80 but added extra features that made the 6L90 more rugged. Nov 3, 2023 · I have a 2018 GMC Sierra with 6. May 31, 2022 · What Are Some of the Common Issues with 6L80 Transmission? The 6L80 has had a load of transmission problems, some of which directly inhibit drivability. Issues with the 1-2-3-4 pistons are common in 6L80 transmissions. The General Motors 6L80-E transmissions are among the most diverse and capable transmissions of their time; being used in everything from exciting muscle cars to family SUV’s. buxeh zrb nkvssg kvtqd lizyvh ecstsq chx feputx qra npkxaf klr kiwpn zbg murk jzlm