8HP45 TCM Adaptation Procedure

TCM ADAPTATION - 8HP45

The 8HP45 transmission continuously self calibrates and learns shift points and clutch apply times. It is necessary to perform a minimal drive cycle to provide the proper baseline transmission adaptation. Normal driving of the vehicle should be adequate to perform the adaptation. The adaptation procedure should be performed if any of the following procedures are performed:

- Transmission Assembly Replacement
- Transmission Control Module Assembly (TCMA) Replacement
- Internal Transmission repairs.
- Torque Converter Replacement.

1. With the scan tool, clear any DTCs that may be set.
2. Drive the vehicle until the vehicle is at normal operating temperature.
3. After the vehicle has reached normal operating temperature, drive the vehicle normally so the transmission shifts through all 8 speeds.