DRIVE AXLE SERVICE W/DANA AXLE MAINTENANCE INFORMATION

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.

FIGURES: 1

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM THOSE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR TO PROVIDE INFORMATION THAT COULD ASSIST IN THE PROPER SERVICE OF A VEHICLE. PROPERLY TRAINED TECHNICIANS HAVE THE EQUIPMENT, TOOLS, SAFETY INSTRUCTIONS AND KNOW-HOW TO DO A JOB PROPERLY AND SAFELY. IF A CONDITION IS DESCRIBED, DO NOT ASSUME THAT THE BULLETIN APPLIES TO YOUR VEHICLE, OR THAT YOUR VEHICLE WILL HAVE THAT CONDITION. SEE A GENERAL MOTORS DEALER SERVICING YOUR BRAND OF GENERAL MOTORS VEHICLE FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE INFORMATION.

COPYRIGHT 1993 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.