Gm 6l90 transmission problems. Common Problems with the 6L90 Transmission.

Gm 6l90 transmission problems All the General Motors 6L90 Jun 3, 2020 · Upon removing the transmission to change the filter, or doing any service to the transmission requiring a refill of the fluid, vehicle not wanting to move or engage the transmission in any range. Sep 30, 2023 · GM 6L90 transmission problems have caused the National Highway Traffic Safety Administration to open an investigation based on five alleged transmission failures. The 6L90 transmission has been known to have problems, especially with the torque converter. Once you remove the transmission, you are in resolution mode! Determining control-related issues versus a transmission performance problem is difficult since this unit does not offer the ability to back probe electrical circuits to verify proper operation and commands. Apr 8, 2025 · What is the GM 6-Speed Transmission? The Hydra-matic 6L80/6L90 is a six-speed automatic transmission GM started using in 2006, first in Corvettes and certain Cadillac models before rolling it out to trucks in 2007. In this Drivetrain 101, we’ll analyze all of its most prolific problems, solutions and upgrades. Solving 6L80 / 6L90 valve body problems. It is supposed to be a superior device that saves fuel and is electronically operated. However, like any mechanical component, it can develop issues over time. In most cases, this vital piece of the 6L80 / 6L90 transmission can be fairly reliable. The 6L90 transmission is a heavy duty six-speed automatic transmission that was introduced in 2005. Common Problems with the 6L90 Transmission. Nov 8, 2023 · The 6L90 MYD transmission is a 6-speed automatic transmission that was built and installed in some of GM's rear wheel and rear biased all-wheel drive vehicles. Oct 18, 2024 · Checking the transmission fluid for proper levels and clarity can be a good first step. Read Also: 200R4 Transmission—All You Need to Know Mar 31, 2020 · Learn why the JMBX converter in full-size GM trucks and SUVs is prone to failure and how to prevent it with a Sonnax forged cover and piston. Apr 3, 2025 · The 6L90 transmission, found in various Chevrolet and GMC models, is known for its robust performance and smooth shifting. It is manufactured by General Motors and is used in GM vehicles such as the Chevrolet Silverado and GMC Sierra. 6 L8T (6L90), 2020-present. Watch for these common symptoms: Slipping Gears: If your vehicle unexpectedly slips out of gear or struggles to stay in gear, this may indicate worn clutches or low fluid levels. GM applications equipped with a TEHCM (Transmission Electrical Hydraulic Control Module) such as the 6L and 6T equipped vehicles can exhibit any of the following concerns in any combination: MIL on. The plucking rod actuator assembly GM part number 24200173 has been known to fail and cause most of these concerns. Detecting issues with your 6L90 transmission early can help prevent more significant damage. 0 (6L90), 2015-2019 GMC Sierra 2500HD/3500HD 6. Car Fix Experts Apr 5, 2022 · This issue is one of those problems that most would not want to see come through their door. Oct 13, 2023 · Always remember that your best diagnostic tool is using the vehicle as a dyno. 2010 – 2012 GMC Terrain. The General Motors 6L80-E & 6L90-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. The problem with repairing a 6L80 / 6L90 valve body is that you don’t really know what kind of stress and extreme temperature changes they have been subjected to. The transmission was outfitted to several GM rear-wheel and 4-wheel drive heavy-duty and diesel trucks, Cargo Vans, and cars. Here is a detailed list of vehicles that have the 6L90 transmission. The 6L90 transmission, used in many vehicles, has been known to experience several issues. As an auto owner, being aware of the potential problems and their symptoms can save you from costly repairs down the road. Mar 16, 2023 · Hopefully this will help many of you in the repair of GM 6L45, 6L50, 6L80 and 6L90 transmissions. The investigation is limited to cutaway vans, and the 2019 and 2020 models aren’t affected. Jim Mobley is a Sonnax technical communication specialist. It’s found in a huge range of vehicles including: Chevrolet Silverado and GMC Sierra trucks; Tahoe and Suburban SUVs Chevrolet Suburban 2500 (6L90), 2008-2013 GMC Savana 2500-3500 (6L90-E), 2010-present GMC Sierra 2500HD/3500HD 6. These 6L90 transmission upgrades made the 6L90 stronger, allowing it to be called a heavy-duty 6L80. Which other GM vehicles have this transmission? A few of the high-power LS sports cars, including: Chevrolet Aug 7, 2024 · How to Know if You’re Experiencing 6l90 Transmission Problems. 0 (6L90), 2007-2014 GMC Sierra 2500HD/3500HD 6. He is a member of the Sonnax TASC Force (Technical Automotive Specialties Committee), a group of recognized industry technical specialists, transmission rebuilders and Sonnax Transmission Nov 22, 2022 · 6L90 Transmission Problems . If the fluid appears discolored or has an unusual smell, a fluid change may be needed. Find out the possible root causes of the converter problem and the symptoms of transmission failure. Apr 17, 2022 · The R&R of the TEHCM (Transmission Electronic Hydraulic Control Module) for Switch & Film Rebuilds 6L90: 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. What Are the Reported Transmission Problems? It’s bolted to the 6L80 / 6L90 valve body, and can be found in vehicles like the Chevy Camaro 6L80, Chevrolet Silverado 1500 6L80 / 6L90, GMC Sierra 3500 6L90, Chevy Suburban 6L80 / 6L90, GMC Yukon 6L80 as well as many others. Become a 6L80-E and 6L90-E expert now! Oct 24, 2023 · The NHTSA is focusing on the 6L90 transmission used in the 2016-2018 and 2021-2022 Chevrolet Express and GMC Savana cutaway models, which are often used as ambulances and school buses. This is why many people simply install a remanufactured 6L80 / 6L90 valve body, to eliminate the threat of the 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. adzc wtwxa zvnz fjlgiuf ekvhb eeyc lkaniaz dwwkd erpuv rxnbt zzedg iwme fkq dxoz avakpo