For 1990-2009 cars only
6L80 Automatic Transmission - Tip in Low Speed Clunk in First Gear When Throttle is Applied and Released, Engine Braking Sensation at Low Speeds (Reprogram TCM)
| Subject: | 6L80 Automatic Transmission --Tip In Low Speed Clunk in First Gear When Throttle is Applied and Released, Engine Braking Sensation at Low Speeds (Reprogram TCM) |
| Models: | 2008 HUMMER H2, H2 SUT |
| with 6L80 6-Speed Automatic Transmission (RPO MYC) |
Condition
Some customers may comment that the vehicle has a "Tip In" low speed clunk in first gear when the throttle is applied and released in normal "D" drive. Other customers may comment on an engine braking sensation at low speeds in normal "D" drive.
Correction
A revised transmission calibration has been developed to address these issues. Reprogram the transmission control module (TCM) with updated calibration files using the TIS2WEB Service Programming System (SPS) application. As always, make sure your Tech 2® is updated with the latest software version.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation | Description | Labor Time |
|---|---|---|
K5364 | Transmission Control Module -- Transmission Reprogramming with SPS | Use Published Labor Operation Time |
