DIFFERENTIAL & TRANSFER CASE

The difference between a transfer case service and a differential service is -The transfer case acts like a differential, but channels power to the two differentials on different axles rather than to two wheels on the same axle. As in a gearbox, a differential and transfer case require fluid to lubricate the gears, shafts and bearings where metal slides over metal.

Your differential or transfer case needs to operate efficiently to transfer the torque coming out of the transmission to the wheels. Differential faults or transfer case problems will see your vehicle operate at reduced power or not at all. So, it's good idea to have your transfer case service every 30,000 miles.