GMC chevrolet camaro 2000 Service Manual page 424

Driveline/Axle Propeller Shaft
4-7
Knock or Clunk Noise
Step
Action
Value(s) Yes
No
DEFINITION: A knock or a clunking noise in the driveline that occurs during operation of the vehicle in high gear or during
coasting in neutral at a speed of 16 km/h (10 mph.)
Inspect the universal joints for the following conditions:
1
• Damage
-
• Wear
Are any of the universal joints damaged or worn?
Go to Step2 Go to Step 3
2
Replace the worn or damaged universal joint(s).
-
Is there still a knock or a clunking· noise?
Go to Step 3
System OK
Inspect the differential side gears for wear.
<
3
- -
Are any of the differential side gears worn?
Go to Step 4
4
Replace the worn differential side gear(s)?
- -
Is there still a knock or a clunking noise? System OK
Scraping Noise
Step
Action
Value(s) Yes
No
1
Is the vehicle equipped with drum brakes?
-
Go to Step2 Go to Step 4
Inspect the backing plate for contact with the brake drum.
2
Is there contact between the brake drum and the
-
backing plate?
Go to Step 3 Go to Step 4
3
Replace the brake drum or the backing plate.
-
Is there still a scraping noise?
Go to Step 4
System OK
Inspect the pinion flange and the center support bearing
4
for rubbing.
- -
Is there rubbing between the pinion flange and the center
support bearing? Go to Step 5
Correct the interference.
5
-
-
Is there still a scraping noise? System OK
Shudder on Acceleration at low Speed
Step
Action
Value(s) Yes
No
DEFINITION: A shudder during acceleration from 0-24 km/h (0-15 mph)
Inspect the universal joint angle in order to determine of
1
the universal joint angle is incorrectly set or excessive.
-
Is the universal joint angle incorrectly set or excessive?
Go to Step2 Go to Step 3
Add or remove transmission mount shims as needed.
2 -
Is there a shudder during acceleration?
Go to Step 3 Go to Step 5
3
Inspect the flanges for loose or missing bolts/screws?
-
Are there loose or missing bolts/screws in the flanges?
Go to Step 4 Go to Step 5
4
Replace or tighten the bolts/screws to the specified torque.
-
Is there a shudder during acceleration? Go to Step 5 System OK
5
Inspect the universal joints for wear.
-
-
Are the universal joints worn? Go to Step 6
6
Replace the worn universal joints.
- -
Is there a shudder during acceleration?
System OK