Differential Pinion Shaft Locking Screw - Revised
BULLETIN NUMBER: 93-4B-41SECTION: 4B
NUMBER: 1
CORPORATE REFERENCE NUMBER: 264207
DATE: January 1993
SUBJECT:
DIFFERENTIAL PINION SHAFT LOCKING SCREW
MODELS:
1993 AND PRIOR MODEL YEAR 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 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. It 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 (see illustration):
Parts are currently available from GMSPO.