GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Chevy C Cab/Chassis HD (GMT 400) 🢒 Transmission/Transaxle 🢒 Clutch 🢒 Clutch Rattle

Diagnostic Aids

Clutch rattle is a rattling or clicking noise that comes from the clutch or transmission. There may be oil on the driven plate damper or on the clutch disc. The clutch disc may be damaged or have weak disc plate springs and diaphragm springs. If there is still rattling, there may be an internal transmission concern.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. This step explains there parts and the operation of the clutch system.

    2.

  2. This step checks for oil leaks in the clutch system.

Step

Action

Yes

No

DEFINITION: A rattling or clicking noise is coming from the clutch or the transmission.

1

Did you review the clutch symptom operations and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Clutch

2

Inspect for transmission fluid on the driven plate damper.

Is there fluid on the driven plate damper?

Go to Step 4

Go to Step 3

3

Inspect the transmission for noise.

Is the transmission OK?

Go to Step 5

Go to Transmission Replacement in Manual Transmission - NV 4500

4
  1. Repair the leak. Refer to Clutch Assembly Replacement .
  2. Install a new driven disc.

Does the clutch still rattle?

Go to Step 5

System OK

5

Remove the clutch disc and inspect for the following conditions:

    • Damaged diaphragm springs
    • Worn clutch disc

Are the diaphragm springs damaged or the clutch disc worn?

Go to Step 6

System OK

6

Replace the necessary components. Refer to Clutch Assembly Replacement .

Did you find and repair the condition?

Go to Step 7

Go to Diagnostic Aids

7
  1. Install the transmission. Refer to Transmission Replacement in Manual Transmission - NV 4500.
  2. Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 1