GMC chevrolet camaro 2000 Service Manual page 467

4-50 Rear Drive Axle
7
4
5
6
375039
1
4 3
7560
Driveline/Axle
Adjustments Affecting Tooth Contact
The following two adjustments will affect the tooth (
contact pattern:
• An adjustment to the backlash
" An adjustment to the position of the drive pinion
gear ('7) in the rear axle housing
The effects of bearing preloads are. not readily
apparent on hand-loaded tooth contact pattern tests.
Use differential bearing shims (6) in order to adjust the
backlash. The shims (6) move.the entire differential (5)
closer to or farther from the drive pinion gear (7) ..
You can also use bearing shims (2) can in order 10 set
both the differential bearing preload and the pinion
depth (1 ).
" Make the following changes in order to increase
the backlash:
- Increase the thickness of the right bearings
shim (6)
- Decrease the thickness of the left bearing
shim (3)
" Make the following changes in order to decrease
the backlash: ·
- Decrease the thickness of the right bearings
shim (6)
..c:
Increase the thickness of the left bearing
shim (3)
You can adjustthe position of the drive pinion gear (1)
by changing .the thickness of the shims (2) between
the. following components:
., The drive pinion gear head (7)
•. The race of the differential drive pinion gear inner
bearing ·
The drive pinion gear shim (2) is used in the rear axle
in order to compensate for manufacturing tolerances.
e
Increasing the shim thickness moves the drive
pinion gear (7) closer to the centerline of the
differential ring· gear ( 4).
• Decreasing shim thickness moves the drive pinion
gear (7) farther away from the centerlin.e of the
differential ring gear (4),
Effects Of Differential Drive Pinion Gear
Position On Tooth Pattern
The following tooth contact pattern exists when the
differential drive pinion gearis too far away from
the centerline of the differential ring gear:
• High heel(2) contact on the drive Side (4)
• High toe (i) contact on the coast side (3)
(