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Phoenix Friction Technical Bulletin

 TB005


Problem: Chevrolet/GMC Light Truck Disc Failures

Clutch Kits Affected: 04-064, 04-087, 04-105
 
The use of over-sized lock washers on the clutch mounting bolts of GM trucks with 12“ clutches can cause release problems. The larger diameter of the washers can extend through the cutouts in the clutch far enough to contact with the disc. Use only standard 3/8” diameter washers or thread locking compound and torque the bolts to manufacturers specifications.