Chapter 69 POWERPOINT

Use the textbook to define these Technical Terms:

1. automatic locking hub -

2. axle gears -

3. axle housing -

4. differential assembly -

5. differential ratio -

6. limited-slip differential -

7. locking hubs -

8. rear axle ratio -

9. rear axle seals -

10. rear wheel bearings -

Use the textbook to answer these discussion questions:

1. Identify the major parts of a rear drive axle assembly.

Read the chapter summary below:

Summary

■ Power enters the rear axle assembly from the drive shaft. The drive shaft spins the pinion drive gear.

■ The ring gear is driven by the pinion gear it transfers rotating power through an angle change of 90°.

■ Hypoid gears have the driving pinion centerline offset, or lowered, from the centerline of the ring gear.

■ Rear axle ratio is the ratio of ring gear teeth to pinion gear teeth.

■ The differential carrier provides a mounting place for the pinion gear, differential case, and other differential components.

■ A removable carrier bolts to the front of the axle housing. An integral carrier is constructed as part of the axle housing.

■ The spider gears include two axle gears and two pinion gears.

■ A limited-slip differential provides driving force to both rear wheels at all times.

■ The most popular type of limited-slip differential uses a clutch pack (set of friction discs and steel plates).

■ A cone clutch limited-slip differential uses the friction produced by cone-shaped axle gears to provide improved traction.