CAMPAIGN:DIFFERENTIAL SHAFT LOCK SCREW LOOSENING
THIS BULLETIN SUPPLEMENTS 82C18, ISSUED OCTOBER, 1982. VEHICLES WHICH HAVE ALREADY BEEN CORRECTED WILL REQUIRE NO FURTHER ACTION.
The National Traffic and Motor Vehicle Safety Act, amended, provides that each vehicle which is subject to a recall campaign of this type must be adequately repaired within a reasonable time after the owner has tendered it for repair. A failure to adequately repair within 60 days after tender of a vehicle is prima facie evidence of failure to repair within a reasonable time. If the condition is not adequately repaired within a reasonable time, the owner may be entitled to an identical or reasonably equivalent vehicle at no charge or to a refund of the purchase price less a reasonable allowance for depreciation.
To avoid having to provide these burdensome solutions, every effort must be made to promptly schedule an appointment with each owner and to repair their vehicle as soon as possible. As you will see in reading the attached copy of the letter which is being sent to owners, the owners are being instructed to contact the nearest Chevrolet Zone Office if their dealer does not remedy the condition within five days of the mutually agreed upon service date. If the condition is not remedied within a reasonable time, they are instructed on how to contact the National Highway Traffic Safety Administration.
DEFECT INVOLVED
In October, 1982, General Motors notified owners that a defect existed on some 1982 C,K10 and G10-20 Series Light Duty Trucks equipped with 8.5" Eaton locking differentials (RPO G80). In that notification, owners were advised that on these trucks, the differential lock screw or differential pinion shaft could come loose and damage the rotating parts of the rear axle.
The National Highway Traffic Safety Administration (NHTSA) has advised General Motors that this defect "could result in a loss of vehicle control and an accident". Accordingly, the NHTSA has requested General Motors to initiate a safety recall to notify the owners whose vehicles have not yet been corrected "of the problem and its consequences". Based on this request, General Motors has reconsidered this matter and has determined that a defect which relates to motor vehicle safety exists on some 1982 C,K10 and G10-20 Series Light Duty Trucks equipped with 8.5" Eaton locking differentials (RPO G80).
On these trucks, the differential lock screw or differential pinion shaft could come loose. If this were to occur while the vehicle is in motion, it could result in "a loss of vehicle control and an accident".
To prevent the possibility of this condition occurring, Chevrolet Dealers are to replace the differential lock screw on these vehicles in accordance with the Service Procedure in this bulletin.
VEHICLES INVOLVED
Involved are certain 1982 C,K10 and G10-20 Series Light Duty Chevrolet Trucks equipped with RPO G80 (8.5") Eaton locking differentials assembled at the following assembly plants within these parameters:
Plant From Through --------- -------------------- -------- St. Louis Start of Production CS147194 Janesville Start of Production CJ133666 Lordstown Start of Production C7133044 Flint #1 Start of Production CF336939 Flint #2 Start of Production CF136323 Oshawa Start of Production C1172718 Scarborough Start of Production C4135156 Fremont Start of Production CZ104322
Involved vehicles have been identified by Vehicle Identification Number Computer Listings. Computer listings contain the complete Vehicle Identification Number, owner name and address data, and are furnished to the involved dealers with the campaign bulletin. Owner name and address data furnished will enable dealers to follow-up with owners involved in this cam- paign.
These listings may contain owner names and addresses obtained from State Motor Vehicle Registration Records. The use of such motor vehicle registration data for any other purpose is a violation of law in several states. Accordingly, you are urged to limit the use of this listing to the follow-up necessary to complete this campaign. Any dealer not receiving a computer listing with the campaign bulletin was not shipped any involved vehicles.
OWNER NOTIFICATION
Owners will be notified of this campaign on their vehicles by Chevrolet Motor Division (see copy of Owner Letter included with this bulletin).
DEALER CAMPAIGN RESPONSIBILITY
Dealers are to service all vehicles subject to this campaign, regardless of mileage, age of vehicle, or ownership, from this time forward.
Whenever a vehicle subject to this campaign is taken into your new or used vehicle inventory or it is in your dealership for service in the future, you should take the steps necessary to be sure the campaign correction has been made.
SERVICE PROCEDURE
o Inspection
1. Raise vehicle on hoist.
2. Inspect rear axle code stamped on top of right axle tube outboard of carrier.
KHA G 001 1 Axle & Vehicle Code SOURCE CODE DATE CODE Shift Code ------------------- ----------- ------------ ---------- G = Gear & Axle Jan. 1 = 001 1st Shift
A. When the source code is "W", "C" or "K", lower the vehicle and install the campaign completion label. No further action is required.
B. When the source code is "G", proceed with the following modification.
3. Clean all dirt from around carrier cover.
4. Drain lubricant from carrier by removing cover.
5. Rotate the case to the position shown in Figure 1. Support the differential pinion shaft so that it cannot fall into the case and remove the differential pinion shaft lock screw and discard.
6. Clean the case assembly of any excessive lubricant in the threaded area of the lock screw hole.
7. Install the new lock screw, P/N 14056196, which is coated with an adhesive patch and torque to 25 ft.lb.
8. Clean the carrier and cover of any old gasket material.
9. Install new gasket, P/N 3993593, and torque cover attaching bolts to 20 ft.lbs. Torque carrier cover bolts in a clock- wise pattern to insure uniform draw on cover gasket.
10. Fill axle with 4.2 pints of lubricant, P/N 1052271 (24 oz. container) or P/N 1052272 (15 gal. container).
11. Lower vehicle.
12. Open hood and install campaign label according to instructions contained in this bulletin.
VEHICLE MUST REMAIN STATIONARY FOR AT LEAST TWO(2) HOURS FOLLOWING SERVICING INVOLVING LOCK SCREW INSTALLATION TO INSURE CURING OF ADHESIVE ON SCREW THREADS. HOWEVER, VEHICLE CAN BE MOVED FROM SERVICE AREA TO AN ONSITE PARKING AREA IF SUCH DRIVING IS MODERATE AND PERFORMED IMMEDIATELY AFTER COMPLETION OF AXLE SERVICING.
PARTS INFORMATION
Parts required to complete this campaign are to be obtained by the dealer from your Warehousing and Distribution Division of General Motors.
Part Number Quantity Description ----------- -------- -------------- 14056196 1 Pinion Shaft Locking Screw 3993593 1 Cover Gasket
CLAIM INFORMATION
Submit a Product Claim with the information indicated below:
Parts Failed **Parts Failure Labor Labor *Other Count Part No. Allowance Code Operation Hours Hours ----- -------- --------- ------ --------- ----- ------ 00 V1401 .2
Description: Inspect rear axle assembly for source code. Code not requiring pinion shaft lock screw replacement as identified in this bulletin, indicate no further action required.
Parts Failed **Parts Failure Labor Labor *Other Count Part No. Allowance Code Operation Hours Hours ----- -------- --------- ------ --------- ----- ------ 2 14056196 00 V1400 .5 .1
Description: Replace pinion shaft lock screw according to the instructions contained in this bulletin. Dealer will automatically receive $5.31 for rear axle lubricant which includes the 30%.
*Campaign Administrative Allowance.
**The Parts Allowance should be the sum total of the current WDDGM Net plus 30% of all parts required for the repair.
Dealers will automatically receive the correct parts and labor allowance based on the Labor Operation performed.
Refer to the Chevrolet Claims Processing Manual for details on Product Campaign claim submission.
CLAIM IDENTIFICATION LABEL
Each vehicle modified in accordance with the instructions outlined in this Product Campaign Bulletin will require a "Campaign Identification Label". Each label provides a space to include the five digit dealer code of the dealer performing the campaign service. This information may be inserted with a typewriter or ballpoint pen.
Each "Campaign Identification Label" is to be located on the radiator core support in an area which will be visible when the vehicle is brought in for periodic servicing by the owner.
Apply "Campaign Identification Label" only on a clean dry surface.
ADMINISTRATIVE PROCEDURE
REFER TO THE CURRENT CHEVROLET SERVICE POLICIES AND PROCEDURES MANUAL AND CLAIMS PROCESSING MANUAL FOR CAMPAIGN HANDLING AND ADMINISTRATIVE PROCEDURE.
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.
