Differential Pinion Shaft Lock Screw - Service
Number: 93-77-4BSection: 4B
Date: JAN. 1993
Corporate Bulletin No.: 264207
ASE No.: A3
Subject: DIFFERENTIAL PINION SHAFT LOCKING SCREW
Model and Year: 1984-93 CAPRICE AND CAMARO 1984-93 ALL LIGHT DUTY TRUCKS
Anytime a differential pinion shaft locking screw is removed (Figure 1), it is important to coat the screw threads with Loctite 242 (GM Part number 12345382), or equivalent, before reinstalling. These screws are coated with an adhesive which helps to prevent the screw from loosening in the case. When this screw is removed, the adhesive is also removed. If a new locking screw is necessary, they are available through GMSPO and are coated with the correct adhesive.
Torque the locking screw to the following specifications:
7-1/2", 7-5/8" and 8-1/2" 36 N-m (27 lbs.ft.)
9-1/2" 50 N-m (37 lbs.ft.)
PARTS INFORMATION:
If a new differential pinion shaft locking screw is required, order the following:
Application Part Number
7-1/2", 7-5/8" and 8-1/2" 14056196
9-1/2" 12337979
Goodwrench 242 Threadlooker 12345382
Parts are currently available from GMSPO.