Diagnostic Aids
There are a few factors to know when there is a clunk in acceleration or deceleration. You should always check the engine mounts for looseness or damage. Also check the clutch driven plate to see if it is worn or damaged. Sometimes the clunk noise may come from worn or damaged universal joints.
Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
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This step inspects for loose or damaged engine mounts.
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This step inspects for worn or damaged driven clutch plate.
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This step inspects for worn or damaged universal joints.
Step | Action | Yes | No |
|---|---|---|---|
DEFINITION: A clunk is heard and/or felt on acceleration or deceleration. | |||
1 | Did you review the manual transmission symptom and perform the necessary inspections? | Go to Step 2 | |
Inspect the engine mounts for looseness or damage. Refer to Engine Mount Inspection in Engine Mechanical-4.8 , 5.3 L, and 6.0 L. Did you find and repair the condition? | Go to Step 7 | Go to Step 3 | |
Is the clutch driven plate worn or damaged? | Go to Step 4 | System OK | |
Did you find and repair the condition? | Go to Step 7 | Go to Step 5 | |
Inspect the driveline. Are the universal joints worn or damaged? | Go to Step 6 | System OK | |
Replace the universal joints. Refer to Universal Joint Replacement - Nylon Injected Ring or Universal Joint Replacement - External Snap Ring in Propeller Shaft. Did you find and repair the condition? | Go to Step 7 | Go to Diagnostic Aids | |
7 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 1 |
