Fault Phenomenon: Caterpillar D6N dozer after the transmission computer (TCM) is replaced, shift impact is severe and requires relearning.

Troubleshooting Process:– Checked TCM configuration: parameters not written.
– Checked clutch pressures: baseline pressure not calibrated.
– Executed learning procedure: road test conditions not met.
– Checked oil temperature: not within specified range.

Root Cause: The Transmission Control Module (TCM) did not have the shift quality self-learning procedure performed.

Required Parts: Perform self-learning calibration with diagnostic tool.