Drivetrain - Maintenance On Drive Axle Service

Group Ref.: Drive Axle

Bulletin No.: 364202

Date: October, 1993

SUBJECT:
INFORMATION ON DRIVE AXLE SERVICE

MODELS:
1992-93 C3 (3500 H.D.) TRUCKS EQUIPPED WITH DANA REAR AXLE





Additional rear axle scheduled maintenance is required on 1992-93, 3500 H.D. models equipped with Dana rear axles (Figure 1) when they are driven under the following conditions:

- Extreme loading (at or near GVWR) or trailer towing and:

- Operation above 45 MPH for extended periods of time

Vehicles used in any of these driving conditions require the rear axle lubricant (SAE 80W-90 - GL-5) be changed every 3 months or 3,000 miles, whichever comes first.

To reduce required maintenance, SAE 75W-140 synthetic lubricant (P/N 12346140) may be used. If synthetic SAE 75W-140 lubricant is used, the fluid change intervals may be increased to 30,000 miles. Before installing, it is important to drain and flush the axle with clean mineral based (non-synthetic) axle lubricant. Dana rear axle fluid capacity is 3.9L (4.12 qts).

SERVICE PARTS INFORMATION

P/N Description

12346140 (SAE 75W-140 Synthetic Axle Fluid, 1 qt.

Parts are currently available from GMSPO.