Product Description
BEFORE INSTALLING KIT, TEST SWITCHES TO VERIFY PROPER ELECTRICAL OPERATION. KIT REPAIRS LAMINATE DISC AND SEAL FAILURES ONLY; IT WILL NOT RECTIFY ELECTRICAL BREAKDOWN.
Tooling Required
6L45 6L50 6L80 6L90 6T70/6T75 (GEN-1) Pressure Switch Rebuild Kit
Listed GM 6-speed transmissions often set various trouble codes related to failures of fluid pressure switches that are internal to the transmission electro-hydraulic control module (TEHCM). These codes may be accompanied by TCC apply problems or shift irregularities such as slipping, flares, harsh application, and bind-ups. As time goes by, the laminated portions of the pressure switches can breach, preventing normal switch operation. If more than one switch breaks down, failsafe mode can be triggered. Since switches cannot be obtained through OE channels, replacement of the TEHCM was the only previous remedy available.
It is no longer necessary to replace the expensive TEHCM assembly to rectify this concern. Installing Sonnax pressure switch rebuild kit 124740-70K restores normal switch operation, eliminating codes and providing renewed shift performance in all ranges.
- Allows salvage of expensive TEHCM
- Kit includes enough discs and seals to rebuild 10 TEHCM units
Symptoms
- Pressure switch codes
- Switch codes
- Pressure control out-of-range codes
- Slips, flares & bind-ups
- Failsafe mode
- Erratic TCC apply
- Harsh shifts
- Shift codes
Cause
OE pressure switch laminate disc breached, preventing proper switch operation.
Correction
Salvage the transmission control unit and restore normal shift operation by installing Sonnax pressure switch rebuild kit.
Contents
- Laminate Discs (40)
- Seals (40)
