Internal Components

Fig 1: Transfer Case Internal Components

Courtesy of GENERAL MOTORS COMPANY

The OD splines of the input shaft (7) are mated to the ID splines of the transmission output shaft. Power and torque are transferred from the input shaft (7) to the idler shaft (4) via a helical gear set. A second gear set, the hypoid gear set (3) transfers power and torque from the idler shaft to the rear output shaft and flange (1). The propeller shaft is mated to the rear output shaft flange providing power and torque to the rear drive axle. The OD splines of the intermediate drive shaft (6) mate to the ID splines of the transmission carrier assembly and provide power and torque to the right front axle shaft and wheel.

Gear tooth clearances and bearing preloads are maintained by shims located behind the bearing races. The housings, internal gears, and bearings are not serviceable components. If housing, gear set, or bearing damage occurs, the assembly must be replaced.

1. Rear Output Flange
2. Rear Output Shaft Seal
3. Rear Output Shaft
4. Idler Shaft
5. Front Wheel Drive Input Shaft Bearing Retainer Front Seal
6. Intermediate Drive Shaft-to-Transmission Splines
7. Input Shaft
8. Front Wheel Drive Input Shaft Bearing Retainer Rear Seal
9. Intermediate Drive Shaft
10. Front Wheel Drive Intermediate Drive Shaft Bearing Seal
11. Front Wheel Drive Intermediate Drive Shaft Seal