Electronic Pinion Factor

A pinion factor is stored in the TCM in order to provide the appropriate distance pulses for a vehicle. The pinion factor is programmed into the TCM at the factory on new vehicles. If a TCM is replaced, the electronic pinion factor must be programmed with the DRB Scan Tool.

The nature of the Electronic Pinion Factor requires that certain features must be taken into consideration:
- If no pinion factor is stored in an installed TCM, the vehicle speedometer will not indicate speed when moving
- Selecting the wrong final drive ratio or tire size may cause the speedometer accuracy to fall out of specification

Use the following procedures to set the electronic pinion factor using the DRB Scan Tool:
- Select "Transmission" system, then -"Miscellaneous" functions, then "Pinion Factor". The DRB will display the current tire size.
- If the tire size is incorrect, depress the Enter key and then select the correct size.
- Depress the Page Back key to exit the reset procedure.