CAMPAIGN: IMPROPER CLUTCH BRG. TRANS. PILOT SHAFT COMBINATION
Subject: PRODUCT CAMPAIGN 86C17 IMPROPER CLUTCH PILOT BEARING - TRANSMISSION PILOT SHAFT COMBINATION
Model and Year: 1985-86 C7 MEDIUM DUTY CONVENTIONAL TRUCKS WITH LH3, MPH, MWW AND MXN
General Motors has learned that certain 1985-86 C7 medium duty conventional trucks equipped with an 8.2L turbocharged diesel engine, Fuller 10 speed transmission and Lipe, 2 plate, push type, clutch may have been built with an oversized I.D. flywheel pilot bearing. This can result in erratic shift release and difficult shifting.
In some cases there also may be damage to the transmission main drive gear bearing retainer which may restrict clutch disengagement.
VEHICLES INVOLVED
Involved are all 1985-86 C7 medium duty conventional trucks equipped with LH3 (8.2L diesel engine), MPH (Fuller RT 6610 transmission), Mu (Lipe 14" 2 plate push clutch), and MWW (1.75" pilot shaft spline) within the following VIN breakpoints.
MODEL PLANT YEAR FROM THROUGH ------------------ ------ -------- -------- Pontiac (Central) 1985 FV210285 FV212238 Pontiac (Central) 1986 GV105714 GV109505
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 campaign.
These listings may contain owner names and addresses obtained from State Motor Vehicle Registration Records. The use of such motor vehicle regis- tration 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 has no involved vehicles currently assigned.
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 at no charge to owners, regardless of mileage, age of vehicle, or ownership, from this time forward.
Whenever a vehicle subject to this campaign is taken into 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 before reselling or releasing the vehicle.
Owners of vehicles recently sold from your new vehicle inventory are to be contacted by the dealer, and arrangements made to make the required correction according to instructions contained in this bulletin.
PARTS INFORMATION
Parts are to be obtained from General Motors Service Parts Operations (GMSPO). To ensure these parts will be obtained as soon as possible, they should be ordered from GMSPO on a C.I.O. with no special instruction code, but on an advise code (2).
QUANTITY PART NO. DESCRIPTION PER VEHICLE -------- ------------- --------- 908439 Pilot Bearing 1
SERVICE PROCEDURE
Remove transmission, remove clutch, replace pilot bearing, reinstall and adjust clutch and reinstall transmission utilizing the following publica- tions:
o Remove and reinstall transmission: Chevrolet Medium Duty Service Manual, ST-331-84, page 7B-6 #2 Bell Housing.
o Remove clutch: Chevrolet Medium Duty Service Manual, ST-331-84, page 7C-11 Push Type 14" Dual Disc Lipe Clutch.
o Replace pilot bearing: Chevrolet Medium Duty Service Manual, ST-331-84, page 7C-13.
o Reinstall clutch: Chevrolet Medium Duty Service Manual, ST-331-84, page 7C 11 and 12.
o Adjust clutch: Refer to Chevrolet Dealer Service Bulletins 86-66, issued April, 1986 and supplement issued May, 1986.
CAMPAIGN IDENTIFICATION LABEL
Each vehicle corrected 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.
CLAIM INFORMATION
Submit a Product Campaign Claim with the information indicated below:
* FAILED PARTS LABOR LAB OTH REPAIR PERFORMED PC PART NO. ALLOW FC OP HRS HRS ---------------- -- ------- ---- -- ----- ---- --- REPLACE PILOT 1 908439 ** 00 V3740 6.6 0.1 BEARING
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.
