Rear Axle Cross Section - Chevrolet CHEVY VAN G10 SERIES Service Manual

REAR SUSPENSION A N D D R IV E L IN E 4-4
1. Companion Flange
2. D eflector
3. Pinion Oil Seal
4. Pinion Fro n t Bearing
Pinion Bearing Spacer
5.
6.
D ifferential Carrier
One o f the cardinal points o f axle noise diagnosis is the fact
th a t all rear axles are noisy to a certain degree. The action of
transm itting the high engine torque through a 90° turn
reducing propeller shaft speed produces noise in rear axles.
This po in t establishes the need for a line betw een norm al and
abnorm al or unacceptable axle noises.
Slight axle noise heard only at a certain speed or under
rem ote conditions m ust be considered norm al. Axle noise
tends to "p eak " at varying speeds and the noise is in no way
indicative o f trouble in the axle.
15
Fig. 3 —Rear A xle Cross Section (Series 10-20)
Differential Case
7.
Shim (A ) w ith Service Shim
8.
Gasket
9.
10. D ifferential Bearing
11. " C " Lock
Pinion S haft Lock Bolt
12.
13. Cover
14. Pinion Shaft
15. Ring Gear
16.
Side Gear
17. Bearing Cap
18.
A xle Shaft
If noise is present in an objectionable form , loud or at all
speeds, an effo rt should be m ade to isolate the noise as being
in one particular u n it o f the vehicle. Axle noise is often
confused w ith other noises such as tire noise, transm ission
noise, propeller shaft vibration and universal jo in t noise.
Isolation o f th e noise as in any one u n it requires skill and
experience. An attem p t to elim inate a slight noise m ay baffle
even th e best o f diagnosticians. Such practice as raising tire
pressure to elim inate tire noise, listening for th e noise at
varying speeds and on drive, float and coast, and under proper
19. Thrust Washer
20. D ifferential Pinion
21. Shim
22. Pinion Rear Bearing
23. Drive Pinion
C H E V Y V A N S H O P M A N U A L