Chevrolet Silverado / GMC Sierra. Service manual — part 1259

CLUTCH VIBRATION

Replacement.

Clutch disc worn too thin

Replace the clutch assembly. Refer to Clutch
Assembly Replacement.

Cause

Action

DEFINITION: Vibration from the clutch components during disengagement or engagement.
Review the Symptoms - Clutch and perform the necessary inspections.
Excessive driveline torsional activity

Review the Vibration Analysis - Driveline .

Clutch incorrectly installed

Remove the clutch and install it correctly.
Refer to Clutch Assembly Replacement.

Pilot bearing worn or damaged

1. Replace the pilot bearing. Refer to

Clutch Pilot Bearing Replacement.

2. Inspect the input shaft pilot bearing

journal for wear or damage.

3. Replace the input shaft if it is damaged

or worn. Refer to Transmission
Disassemble for the Tremec 5-Speed
(M96) or Transmission Disassemble
for the Tremec 5-Speed (TZO).

Transmission input shaft splines worn or
damaged

1. Inspect the clutch disc to input splines

for wear or damage.

2. Replace the input shaft if the splines are

excessively worn. Refer to
Transmission Disassemble for the
Tremec 5-Speed (M96) or
Transmission Disassemble for the
Tremec 5-Speed (TZO).

Clutch disc facings damaged

Replace the clutch assembly. Refer to Clutch
Assembly Replacement.

Flywheel housing to clutch housing
excessively misaligned

Replace the faulty clutch housing or
transmission front case. Refer to
Transmission Disassemble for the Tremec
5-Speed (M96) or Transmission
Disassemble for the Tremec 5-Speed (TZO).

Clutch out of balance

Replace the clutch assembly. Refer to Clutch

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Clutch - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

REPAIR INSTRUCTIONS

CLUTCH PEDAL REPLACEMENT

Removal Procedure

1. Move the instrument panel to the service position. Refer to Instrument Panel Service

Positioning (Without SLT) or Instrument Panel Service Positioning (With SLT) .

Assembly Replacement.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Clutch - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 1: Clutch Pedal Position Switch Electrical Connector
Courtesy of GENERAL MOTORS CORP.

2. Disconnect the clutch pedal engine start switch electrical connector (1).

3. Remove the clutch master cylinder. Refer to Clutch Master Cylinder Replacement.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Clutch - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 2: Clutch Pedal Bracket Assembly
Courtesy of GENERAL MOTORS CORP.

4. Remove the clutch pedal to clutch pedal bracket bolt.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Clutch - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado