CAMPAIGN:UNDERTORQUED TRANSMISSION TO ENGINE
Subject: PRODUCT CAMPAIGN 94C31 - UNDER TORQUED TRANSMISSION-TO-ENGINE AND/OR TRANSMISSION-TO-CLUTCH HOUSING BOLTS
Model and Year: 1994 S MODEL PICKUPS WITH 2.2L ENGINE (LINDEN ASSY. ONLY)
To: All Chevrolet/Geo Dealers
The National Traffic and Motor Vehicle Safety Act, as 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 repair within sixty (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 that is being sent to owners, the owners are being instructed to contact the Chevrolet Customer Assistance Center if their dealer does not remedy the condition within five (5) 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
General Motors has determined that certain 1994 Chevrolet S Model Pickups built at the Linden Assembly Plant and equipped with 2.2L engines (LN2) may have transmission-to-engine bolts tightened below the specified torque. on vehicles equipped with an automatic transmission (RPO M30), any of the six bolts that attach the transmission to the engine may be affected. On vehicles equipped with a manual transmission (RPO MW1), any of the six bolts that attach the bell housing to the engine, as well as the four bolts that attach the transmission to the bell housing may be affected. This "low torque". condition could cause very noticeable driveline disturbance. If the operator failed to heed this warning, further damage could occur, including transmission case fracture and possible fluid leaks, transmission torque converter, pump, or clutch damage, loss of drive, or the inability to disengage the clutch.
To correct this condition, dealers are to properly torque the "transmission-to-engine and/or transmission-to-clutch housing bolts.
VEHICLES INVOLVED
Involved are certain 1994 Chevrolet S Model Pickups built at the Linden Assembly Plant and equipped with 2.2L engines (LN2) and 4L60E 4-speed automatic transmissions (RPO M30) or Borg Warner manual transmissions (RPO MW1) . Involved vehicles were built within the following VIN breakpoints:
YEAR MODEL PLANT PLANT CODE FROM THROUGH
1994 S Model Pickup Linden "K" RK100009 RK156386
Involved vehicles have been identified by Vehicle Identification on Number Computer Listings. Computer listings contain the complete Vehicle Identification Number, owner name and address data, and are furnished to 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 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 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) and customers will personally be contacted by phone.
DEALER CAMPAIGN RESPONSIBILITY
All unsold new vehicles in dealers' possession and subject to this campaign must be held and inspected/repaired per the service procedure of this campaign bulletin before owners take possession of these vehicles.
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.
Owners of vehicles recently sold from your new vehicle inventory with no owner information indicated on the dealer listing, are to be contacted by the dealer, and arrangements made to make the required correction according to the instructions contained in this bulletin. This could be done by mailing to such owners a copy of the owners letter accompanying this bulletin. Campaign follow-up cards should not be used for this purpose, since the owner may not as yet have received the notification letter.
In summary, whenever a vehicle subject to this campaign enters your vehicle inventory, or is in your dealership for service in the future, please take the steps necessary to be sure the campaign correction has been made before selling or releasing the vehicle.
PARTS INFORMATION
Parts are not required to complete this campaign.
SERVICE PROCEDURE - FIGURES REFERENCED LOCATED ON PAGES 5-7.
AUTOMATIC TRANSMISSION
For vehicles equipped with 2.2L Engine And 4L60E (RPO M30 Figure 1, Item 1) automatic transmission, perform service procedure below.
1. Move gear selector to LOW "1".
2. Raise vehicle.
3. Disconnect all exhaust hangers (2 or 3 depending on wheelbase) and lower exhaust system.
4. Remove fuel line bracket at cross member.
5. Remove transmission control lever (Figure 3, Item 3) from transmission shift lever (Figure 3, Item 5).
6. Position transmission jack under transmission.
7. Remove 3 left side transmission crossmember bolts.
8. Remove 4 right side transmission crossmember bolts.
9. Remove transmission mount nut and crossmember from vehicle.
10. Lower transmission (Figure 1, Item 1) as required to access transmission attaching bolts.
11. Torque 5 transmission-to-engine bolts (Figure 1, Item 2), using a 28" extension, to 90 Nm (66 lb. ft.).
12. Torque nut (Figure 1, Item 5) on lower right side transmission- to-engine bolt (Figure 1, Item 3) to 90 Nm (66 lb. Ft.).
13. Raise transmission to proper installation position.
14. Install crossmember and torque 3 left side and 4 right side bolts to 54 Nm (40 lb. ft.)
15. Torque transmission mount nut to 45 Nm (33 lb. ft.).
16. Remove transmission jack.
17. Install transmission control lever (Figure 3, Item 3) to transmission shift lever (Figure 3, Item 5) and fasten.
18. Install fuel line bracket at transmission crossmember and torque to 17 Nm (13 lb. ft.).
19. Reconnect all exhaust hangers and torque fasteners to 25 Nm (18 lb. ft.).
20. Adjust linkage using the following procedure:
A. Linkage adjustment must be performed at the transmission prior to any "PRNDL" indicator adjustment at the steering column.
B. Full weight of vehicle must be on wheels (curb height). DO NOT use a frame hoist to raise the vehicle for this procedure. Mandatory that vehicle be raised on a twin post hoist or utilize an alignment rack.
C. Position the steering column shift lever in the "Neutral" gate notch (DO NOT use indicator to find "Neutral").
D. Loosen bolt (Figure 3, Item 2) in the swivel (Figure 3, Item 4) that clamps the shift rod (Figure 3, Item 1) to the transmission equalizer lever (Figure 3, Item 3). Make sure that the shift rod moves freely in the swivel.
E. Set transmission lever (Figure 3, Item 5) in neutral detent. Obtain neutral detent by indexing transmission lever all the way clockwise to "Park", then counter- clockwise to "Neutral" (Alternate procedure is to rotate transmission lever counter-clockwise all the way to "L1", then rotating it clockwise four detents).
F. Make sure that transmission control lever (Figure 3, Item 3) is fully seated in transmission lever (Figure 3, Item 5). Hold the rod (Figure 3, Item 1) tightly in the swivel (Figure 3, Item 4). Tighten clamp screw (Figure 3, Item 2) against rod (Figure 3, Item 1) to 25 Nm (18 lb. ft.). Make sure rod does not move in the swivel while tightening the screw.
G. Verify proper adjustment:
0 When moving transmission shift lever in either direction, all detent positions will be attainable without a binding condition present.
0 With the key on and the shift lever in "Reverse", the key will not be removable and the steering column will not be locked.
0 With the key in the lock position and the shift lever in the "Park" position, the key will be removable, the steering wheel will be locked, and the shift lever will not disengage "Park". In addition, verify that the vehicle is held stationary in "Park".
0 The engine must start in the "Neutral" or "Park" positions only. Adjust neutral safety switch as required.
0 Verify that shift indicator position matches actual transmission range. Adjust "PRNDL" switch as required.
21. Lower vehicle.
22. Return selector to "Park".
23. Install Campaign Identification Label.
24. Wash vehicle and return to customer.
Manual Transmission
For vehicles with 2.2L engine and 5 speed (RPO MW1 Figure 2, Item 1) manual transmission, perform the following procedure:
1. Place shift lever in "Neutral".
2. Raise vehicle.
3. Disconnect all exhaust hangers (2 or 3 depending on wheelbase) and lower exhaust system.
4. Position transmission jack under transmission.
5. Remove 3 left side transmission crossmember bolts.
6. Remove 4 right side transmission crossmember bolts.
7. Remove transmission mount nut and crossmember from vehicle.
8. Lower transmission until top of extension is no more than 6" from floorpan.
9. Torque 5 transmission-to-engine bolts (Figure 2, Item 2), using a 28" extension, to 90 Nm (66 lb. ft.).
10. Torque nut (Figure 2, Item 4) on lower right side transmission- to-engine bolt (Figure 1, Item 3) to 90 Nm (66 lb. Ft.).
11. Torque 4 transmission-to-clutch housing bolts (Figure 2, Item 3) to 75 Nm (55 lb. ft.) A "crowsfoot" wrench may be needed to access these bolts.
12. Raise transmission to proper installation position.
13. Install crossmember and torque 3 left side and 4 right side bolts to 54 Nm (40 lb. ft.)
14. Torque transmission mount nut to 45 Nm (33 lb. ft.).
15. Remove transmission jack.
16. Reconnect all exhaust hangers and torque fasteners to 2-5 Nm (18 lb. ft.).
17. Lower vehicle.
18. Install Campaign Identification Label.
19. Wash vehicle and return to customer.
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 campaign number and the five (5) digit dealer 'code of the dealer performing the campaign service. This information may be inserted with a typewriter or a ball point 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. Additional "Campaign Identification Labels" can be obtained from DAC.
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 LABOR OTHER NET REPAIR PERFORMED PC PART NO. ALLOW CC-FC OP HOURS HOURS AMOUNT -------------------------------------------------------------------------- Torque Bolts - Manual Or - - - - - SK-00 V9060 1.0 .1 - - Automatic Transmission
Wash Customer Vehicle - - - - - 02-95 T3431 - - - - $6.00
* Campaign Administrative Allowance.
Dealers will automatically receive the correct labor and material allowance based on the labor operation performed.
Refer to the Chevrolet Claims Processing Manual for details on Product Campaign Claim Submission.
Dear Chevrolet S Model Pickup Owner:
As a valued customer, your complete satisfaction with your Chevrolet Truck is our goal. In keeping with this goal, we want to let you know that we have discovered a condition that could affect your vehicle and we want to take care of it at no charge to you.
REASON FOR THIS RECALL
Certain 1994 S Model Pickups, such as yours, may have transmission-to- engine bolts tightened below the specified torque. This condition could result in a very noticeable driveline disturbance and if left uncorrected, could result in transmission damage.
WHAT WE WILL DO
To be absolutely sure that your vehicle is to specifications, dealers will inspect and properly torque the transmission-to-engine housing bolts. This service will be performed for you at no charge.
WHAT YOU SHOULD DO
Instructions for making this inspection/correction have been sent to your dealer and parts are available. Please contact your Chevrolet dealer as soon as possible to arrange a service date and so the dealer may order the necessary parts for the repair. The labor time necessary to perform this service correction is approximately 1 hour, but you should ask how much additional time your dealer will need to schedule and process your vehicle.
The enclosed owner reply card identifies your vehicle. Presentation of this card to your dealer will assist in making the necessary inspection/correction in the shortest possible time. If you have sold or traded your vehicle, please let us know by completing the postage paid reply card and returning it to us.
We are sorry to cause you this inconvenience; however, we have taken this action in the interest of your safety and continued satisfaction with our products.
Chevrolet Motor Division GENERAL MOTORS CORPORATION
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.
