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Pinion Factor Procedure

WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 1995 Plymouth Voyager, 1995 Plymouth Grand Voyager, 1995 Jeep Wrangler, 1995 Jeep Grand Cherokee, and 1995 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
  1. Pinion factor procedure must be performed if Transaxle Control Module (TCM) is replaced or changed from one vehicle to another. Procedure must be used to calibrate TCM for different equipment combinations to provide speedometer operation and correct readings. Failure to perform this procedure will result in no speedometer operation.
    NOTE: It may be necessary to consult manufacturer to determine Final Drive Ration (FDR) number when performing pinion factor procedure.
  2. Connect DRB to data link connector, located near brake pedal at bottom of instrument panel. Using proper cartridge and DRB manufacture's instructions, move through program to enter 41TE/AE menu. Select ADJUSTMENTS function.
  3. Select PINION FACTOR function. Select appropriate Final Drive Ratio (FDR) number and then the tire size. Remove DRB. Road test vehicle and verify speedometer operation.
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