Transfer Case & Parts

A transfer case is a segment of the four-wheel-drive drivetrain, all-wheel-drive, and other multiple powered axle cars. It is the transfer case that would transfer power from the transmission via drive shafts to the front and rear axles. It also guarantees that the difference between front and rear wheel rotation is synchronised, and may also provide one or more low-range gear sets for off-road use.

It is the car engine that would provide transmission power, and then pass the power to the transmission case. The power is transferred either through a chain or a series of gears from the output shaft, and then torque is sent to the front and rear driveshafts, which would then transfer the power to the axles. The most common method by which a transfer case can be powered is chains and the reason for this is that they are quieter and lighter than gears. Now when the four-wheel-drive for part-time 4WD systems would not be engaged, then 100% of the power would be sent to the rear wheels. But when the four-wheel drive is engaged, the power is evenly split between the front and the rear, and all four wheels are driven by the transmission case. The power is uniformly distributed as the transmission cases operate in sync with the drive axles, differentials, driveshafts, battery, and wheels. In the transfer case, there are generally two gear settings, that is, the high and the low. The low gears would provide more torque at slower speeds and are more geared towards intense off-road situations such as rock crawling and hill climbing. And the high gears are for more basic off-road situations like ice, dirt and heavy rain.

The transfer case is located via the driveshafts between the transmission and the front and back differentials creating a two-wheel drive (2WD) or four-wheel drive vehicle. It would direct the power to two or four wheels on a four-wheel or all-wheel drive (AWD) auto.