The single speed rear axles are made up of the following
2 main components:
| • | The differential carrier assembly |
The banjo-type rear axle housing carries the weight of the vehicle.
The rear axle housing provides a machined spindle surface for the rear wheel
bearings. The rear wheel hubs rotate on the rear wheel bearings, allowing
the rear axle shafts to float within the rear axle housing.
The differential carrier assembly has the following two purposes:
| • | In order to change the driving force 90 degrees from the
propeller shaft |
| • | In order to allow the rear wheels to turn at different speeds |
The differential carrier assembly consists of the following:
| • | The differential drive pinion gear |
| • | The rear propeller shaft yoke (drive pinion) |
| • | The differential carrier |
The complete carrier assembly may be removed from the vehicle without
removing the rear axle assembly.
Two-Speed Description
The two-speed rear axle contains 2 different gear ratios or ranges.
The two speed rear axles operate in the same way as the single speed rear
axles. The driver selects the range using one of the following items:
| • | A two-speed rear axle shift switch |
| • | A two-speed rear axle shift control valve |
A two-speed rear axle shift motor mounted on the rear carrier engages
a shift fork. The shift fork selects the range chosen by the driver.
The two-speed rear axle shift motor is powered by one of the following
ways:
The shift fork will perform one of the following functions:
| • | Slide up a collar onto the sun gear of a planetary gear set. |
| • | Slide the entire sun gear assembly in or out of the gear set. |
Two possible gear ratios may come from the same gear axle.
Rear Axle Identification Description
For complete rear axle identification information, refer to
Rear Axle Identification
in General Information.
| • | For unit repair information of the Dana/Spicer® differential
carrier assembly, contact the Spicer® Support Line at 1-800-666-8688. |
| • | For unit repair information of the Eaton® differential carrier
assembly or the power divider, contact Eaton® Roadranger® Service
at 1-800-826-HELP (1-800-826-4357). |
| • | For unit repair information of the Rockwell differential carrier
assembly, contact the Rockwell Field Support Center at 1-800-535-5560. |
