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Chevrolet Workshop Service and Repair Manuals

Drive Axles, Bearings and Joints > < Vehicle - Engine Crankcase and Subsystems Flushing Info.|Page 5280
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Differential Assembly: Technical Service Bulletins
Differential Pinion Shaft Lock Screw - Service

Number: 93-77-4B
Section: 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.

Drive Axles, Bearings and Joints > < Vehicle - Engine Crankcase and Subsystems Flushing Info.|Page 5280