GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

DEFINITION:The clutch grabs or chatters during engagement.

1

Check for loose engine mounting fasteners.

Are the engine mounting fasteners loose?

--

Go to Step 2

Go to Step 3

2

Tighten the engine mounting fasteners to the specified torque. Refer to Engine Mount Replacement in Engine Mechanical.

Does the clutch still grab?

--

Go to Step 3

System OK

3

Check for a damaged engine mount.

Is the engine mount damaged?

--

Go to Step 4

Go to Step 5

4

Replace the engine mount. Refer to Engine Mount Replacement in Engine Mechanical.

Does the clutch still grab?

--

Go to Step 5

System OK

5

Check the pressure plate assembly for burned or smeared resin.

Is there burned or smeared resin on the pressure plate?

--

Go to Step 6

Go to Step 7

6

If the burns or smears are superficial, clean or sand off the excess resin. If the pressure plate is burned or has heat checked parts, then replace the pressure plate. Refer to Clutch Pressure and Driven Plate Replacement ..

Does the clutch still grab?

--

Go to Step 7

System OK

7

Check for a warped pressure plate.

Is the pressure plate warped?

--

Go to Step 8

Go to Step 9

8

Replace the pressure plate. Refer to Clutch Pressure and Driven Plate Replacement .

Does the clutch still grab?

--

Go to Step 9

System OK

9

Check for oil on the clutch pressure plate facing or a burned or glazed facing.

Is there oil on the clutch pressure plate facing or a burned or glazed facing?

--

Go to Step 10

Go to Step 11

10

  1. Correct the leak at the source. Refer to Oil Leak Diagnosis in Engine Mechanical.
  2. Install a new clutch pressure plate. Refer to Clutch Pressure and Driven Plate Replacement .

Does the clutch still grab?

--

Go to Step 11

System OK

11

Check for worn splines on the transmission main drive gear.

Are there worn splines on the transmission main drive gear?

--

Go to Step 12

--

12

Replace the transmission main drive gear. Refer to Transmission Removal or to Transmission Removal and to Transmission Disassemble or to Transmission Disassemble in Manual Transmission.

Does the clutch still grab?

--

--

System OK