Clutch - Chatter/Shudder On Launch
File In Section: 7 - TransmissionBulletin No.: 66-73-04A
Date: November, 1996
Subject:
Clutch Chaffer/Shudder On Launch (Install Clutch Kit)
Models:
1994-95 Chevrolet and GMC S/T, C/K 1, 2, 3 & P3 Models
with 4.3L, 5.0L and 5.7L Engines (VINs W, Z, H, K - RPOs L35, LB4, L03, L05) and Manual Transmission
This bulletin is being revised to add S/T Models and kit part numbers for clutches in trucks equipped with 4.3L and 5.0L engines. Please discard Corporate Bulletin Number 66-73-04 (Section 7 - Transmission)
Condition
Some owners may report clutch chatter or shudder when launching the vehicle from a stop.
Correction
The following components should be installed:
^ Clutch kit with revised tuning (disc and pressure plate assembly)
^ Release bearing with a steel sleeve
^ Release fork with corrected fork tip radius
^ New pilot bearing
Service Procedure
Follow the appropriate Service Manual procedure, Section 7C - Clutch, for clutch assembly replacement.
Important:
Align the light side of the pressure plate assembly, identified by a paint dot near a bolt hole, with the heavy side of the flywheel, identified by an "X". Tighten each pressure plate bolt one turn at a time to evenly compress the spring and avoid warping the pressure plate assembly.
Torque the pressure plate bolts to 40 N.m (29 lb ft).
Parts Information
Parts are currently available from GMSPO.
Warranty Information
For vehicles repaired under warranty, use:
Labor
Operation Description Labor Time
Clutch Disc Use Published
K0800 and/or Cover Labor Operation
Replace Time
Important:
Labor operation is coded to base vehicle coverage in the warranty system.