Automotive 4WD Service (3017 views)
Automotive 4WD Service
4 Wheel Drive, or all wheel drive
Many Four Wheel drive vehicles have 2 differentials and a transfer case. The transfer case connects the transmission to both the front and rear differentials. The service recommendations for the second differential are the same as a 2 wheel drive car or truck. The transfer case is serviced on the same schedule as the transmission. If you use your 4 wheel drive off road, especially in muddy conditions it needs to be serviced much more often.