Diagnostic Aids
If the clutch is disengaged and the vehicle lurches or shudders, the engine mounts may be loose or damaged. If this condition still exists, remove the transmission and inspect the pressure plate for being burned, or for smeared resin from the clutch disc, and also for oil on the pressure plate. Inspect for worn or damaged release bearing and inspect the splines on the transmission main drive gear.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
This step inspects the clutch system components and the operation of the clutch system.
-
This step inspects for faulty engine mounts
-
This step inspects for fluid leakage on the clutch system components.
Step | Action | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|
DEFINITION: The clutch grabs or chatters during engagement. | |||||||||
Did you review the clutch symptom operations and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Clutch | |||||||
Inspect the engine mounts and/or the fasteners. Refer to Engine Mount Inspection in Engine Mechanical - 4.3L or Engine Mount Inspection in Engine Mechanical - 4.8/5.3/6.0L or Engine Mount Inspection in Engine Mechanical - 6.6L or Engine Mount Inspection in Engine Mechanical - 8.1L. Did you find and repair the condition? | Go to Step 12 | Go to Step 3 | |||||||
3 |
Is there burned or smeared resin on the pressure plate? | Go to Step 4 | Go to Step 5 | ||||||
4 | If there are burns or smears, clean or sand off the excess resin. If the pressure plate assembly is burned, or has heat checked parts, then replace the pressure plate assembly. Refer to Clutch Assembly Replacement . Does the clutch still grab? | Go to Step 5 | System OK | ||||||
5 | Inspect for a warped or damaged pressure plate. Is the pressure plate warped? | Go to Step 6 | Go to Step 7 | ||||||
6 | Replace the pressure plate. Refer to Clutch Assembly Replacement . Did you find and repair the condition? | Go to Step 12 | Go to Step 7 | ||||||
7 | Inspect for transmission fluid or oil on the clutch pressure plate facing, or a burned or glazed facing. Is there fluid on the clutch pressure plate facing or a burned or glazed facing? | Go to Step 8 | Go to Step 9 | ||||||
Does the clutch still grab? | Go to Step 9 | Go to Step 12 | |||||||
9 | Inspect for worn splines on the transmission main drive gear. Are there worn splines on the transmission main drive gear? | Go to Step 10 | Go to Step 11 | ||||||
10 | Inspect the release bearing at the transmission main drive gear. Is the release bearing binding? | Go to Step 11 | -- | ||||||
11 | Replace the release bearing. Refer to Clutch Concentric Actuator Cylinder Replacement . Did you find and repair the condition? | Go to Step 12 | Go to Diagnostic Aids | ||||||
12 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 1 | ||||||
