How are Transfer Case Shift Motor issues diagnosed?
Transfer case issues on modern vehicles are obvious as a scanner will identify fault codes related to the issue. The vehicle may drive normally in most instances, so the issue may have to be replicated through driving to determine the cause of the fault. When a transfer case is obviously mechanically damaged, it must be removed, disassembled, checked against specifications, and diagnosed as repairable or not. Mechanical issues may cause failure of an otherwise functional transfer case shift motor.
How are Transfer Case Shift Motors replaced?
Transfer case shift motor replacement involves removing the shift motor from the exterior of the transfer case housing, and moving the electrical connector from the old part to the new part. Then the new shift motor can be installed, ensuring the correct orientation. Finally, testing the shift motor according to the factory recommended shifting procedures will ensure the shift motor is functioning properly.
RepairPal Recommendations for Transfer Case Shift Motor issues
Even if a transfer case issue does not cause complete failure, the vehicle should be placed out of service. This is to protect the transfer case from further damage, and provide safety for the intended occupants. If the transfer case fails during operation, the vehicle may be left permanently in neutral or the transfer case may bind. If the transfer case is malfunctioning electronically it can cause erratic shifts from high to low gear and from two-wheel drive to four-wheel drive. Either situation can cause a dangerous situation while driving.
What to look out for when dealing with Transfer Case Shift Motor issues
Many models of vehicle, even from the same model year, will use a different transfer case than another vehicle of the same type. This is due to differences in gear ratios, engine power, and intended use for the vehicle. Before replacing a transfer case shift motor, ensure that the proper part number is ordered to avoid incompatibility with the installed transfer case. If the vehicle has a variation which uses more or less advanced transfer case control, ensure the part numbers are correct for the intended model.
Can I replace the Transfer Case Shift Motor myself?
This is an easy diagnosis and an even easier repair. Most transfer case shift motors are external, so replacement is as easy as outlined. When diagnosing at home, it may be easiest to remove the shift motor and power it externally to determine if it functions under direct power. If a torque wrench is not available, purchase or borrow one to ensure protection of the transfer case housing.
