As non-synthetic fluid and worn-out solenoids are often the reason for the problem.Īnother significant problem is a crack that affects the drum weld. To diagnose and possibly fix this issue, you will need to check the condition of the transmission fluid in the system as well as the solenoids. Also, the diagnostic tool will indicate the P1870 code when you connect it with the transmission control unit. Typically, you will feel a sense of loss of acceleration on pressing the throttle pedal in first gear. Slipping in the first gear can result in poor acceleration and torque. Though fairly rare, there are instances of total mechanical failure with this problem. This is because the problem primarily stems from worn-out solenoids. To curb this problem, the solenoids of the two gears will have to be repaired or replaced. The most common error code for this problem is P1870 which indicates a slipping transmission component. If you use a diagnostic tool, an error code will be displayed. This will be a good indication of a slip. In some instances of slipping, you will hear a sound indicating there is a slip. As a result, the vehicle will consume a lot of fuel. This slipping problem results in a difficult time utilizing any of the gears. Slipping from 2nd to 3rd with a 6L80 transmission is unfortunately a common experience among Chevrolet and GMC pickup truck owners. The 6L80E transmission is prone to issues that include: 2-3 harsh or delayed shifts, harsh or delayed shifts from park or reverse, burnt 1-2-3-4, or 3-5 reverse clutch, check engine light (DTC P0751 Code), converter shudder due to flaking of the converter lining, shudder on low/reverse apply, TEHCM and/or CAN software malfunction. This will result in 1-2-3-4 application problems. The housing’s inner diameter develops a crack and may break away from the accommodation. This is, however, not as common as the cracking of the piston itself. Therefore, it will be wise to update the piston to the latest designs. The piston typically gets cracks that result in clutch failure. Issues with the 1-2-3-4 pistons are common in 6L80 transmissions. The Transmission Electro-Hydraulic Control Module (TEHCM).Stator Support Issues (Failed Seals and Cracking).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. The 6L80E transmission is widely used in popular GM applications such as the Silverado and Sierra trucks, Tahoe, Suburban, Denali, Hummer H2, Cadillac Escalade, STS, and CTS, Camaro, and G8. This transmission is used in everything from pickup trucks, to SUV's, to audacious muscle cars, to family sedans. This is a completely remanufactured automatic transmission assembled to exacting tolerances and live-run dynamometer tested for reliability. Go Powertrain provides a selection of different performance ratings for the 6L80, including heavy duty and super sport/super duty. This transmission can be used in vehicles weighing up to 8,600 lbs. All previous GM transmissions had been based on hydraulic controls with more electrical aspects with each upgrade, but this unit was developed as an electro/hydraulic controlled transmission. The 6L80/6L90E automatic transmission fills a much needed duty gap between the versatility of the 4.0L series and the Allison variety.
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