CAMPAIGN: NO REVERSE/BAND DRAG REVERSE MOVEMENT IN NEUTRAL

SUBJECT: 4T60 REVERSE SERVO APPLY PIN BORE

Models: 1992 Chevrolet Lumina 1992 Pontiac Grand Prix 1992 Oldsmobile Cutlass Ciera 1992 Oldsmobile Cutlass Supreme 1992 Buick Century 1992 Buick Regal with 4T60 Transaxle (RPO ME9) ----------------------------------------------------------------------------

TO: ALL GENERAL MOTORS DEALERS

General Motors of Canada has determined that a defect which relates to motor vehicle safety exists in certain 1992 Chevrolet Lumina, Oldsmobile Cutlass Ciera, Cutlass Supreme, Pontiac Grand Prix and Buick Century and Regal model vehicles equipped with 4-speed automatic transaxles. The reverse servo apply pin may bind in the case which could cause reverse band distress (loss or slipping of reverse), reverse band drag in drive range (poor performance/low power), or the vehicle to remain in reverse while the indicator shows neutral gear position. If the vehicle remains in reverse while the shift indicator shows neutral, and the driver does not apply the brake, the vehicle may unexpectedly move and and cause an accident without prior warning.

To prevent this condition from occurring, dealers are to inspect and possibly test involved vehicles, and if required, replace transaxles. A DCS message was sent to all dealers November 12, 199 1, with instructions to hold all unsold suspect vehicles until further notice was received. All unsold suspect vehicles MUST be held at dealers and inspected/repaired per the Service Procedure section of this campaign BEFORE owners take possession of these vehicles. Completion of this campaign lifts the hold on unsold vehicles in the DCS message.

VEHICLES INVOLVED:

Involved are certain 1992 vehicles equipped with 4-speed automatic transaxles with transaxle Julian date codes of 282 through and including 297 with case machine operation 50 and machine unit number 4 (see Figure 2) built within the following break points:

Please check the CRIS or DCS system before performing campaign to ensure that your vehicle is affected. Only affected VIN's will be paid.

Plant Year Carline Model Plant Code From Through ---- ------- ----- ----- ----- ----- ------- 1992 Chevrolet Lumina Oshawa #1 9 N9137725 N9151101 1992 Pontiac Grand Prix Fairfax F NF228297 NF233400 1992 Oldsmobile Cutlass Ciera Oklahoma 6 N6324248 N6340744 1992 Oldsmobile Cutlass Supreme Doraville D ND324555 ND333811 1992 Buick Century Oklahoma 6 N6419461 N6429852 1992 Buick Regal Oshawa 1 N1426290 N1434737

NOTE: VIN ranges involved are different than on DCS message dated 11-12-91

While all vehicles involved on the involved VIN fisting will require inspection of the transaxle ID tag for Julian dates, and inspection of the case for machine unit stamp verification, it is estimated that only about 7% of the vehicles will require a transaxle exchange.

All affected vehicles have been identified by the VIN listing provided to involved dealers with this bulletin. Any dealer not receiving a listing was not shipped any of the affected vehicles.

DEALER CAMPAIGN RESPONSIBILITY:

Dealers are to perform this campaign on all involved vehicles at no charge to owners, regardless of kilometres traveled, 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, you are to ensure the campaign correction has been made before selling 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 modification according to instructions contained in this bulletin.

CAMPAIGN PROCEDURE:

Refer to Section 4 of the Service Policies and Procedures Manual for the detailed procedure on handling Product Campaigns. Dealers are requested to complete the campaign on all transfers as soon as possible.

OWNER NOTIFICATION:

All owners of record at the time of campaign release are shown on the attached computer listing and have been notified by first class mail from General Motors. The listings provided are for campaign activity only and should not be used for any other purpose.

PARTS INFORMATION:

Parts required to complete this campaign should be ordered through regular channels, as follows:

Part Number Description Quantity/Vehicle ----------- ----------- ---------------- 8676930 4T60 Transaxle Assembly - 3300L Engine -'A' Cars 1 as required Century Model 2WFH Cutlass Ciera - Trans. Model 2V"

8676931 4T60 Transaxle Assembly - 3800L Engine -'W' Cars 1 as required Regal - Trans. Model 2WVM

8676939 4T60 Transaxle Assembly - 3.1L Engine -'W' Cars 1 as required Regal - Trans. Model 2YKH Lumina - Trans. Model 2YKH Cutlass Supreme - Trans. Model 2YKH Grand Prix - Trans. Model 2YKH

PARTS AND LABOUR CLAIM INFORMATION:

Credit for the campaign work performed will be paid upon receipt of a properly completed campaign claim card or DCS transmission in accordance with the following:

Repair Code Description Time Allowance ----------- ----------- -------------- 1A Perform Inspection Procedure Only - .3 No Further Action Required

2A Perform Inspection and Test Procedure - .5 No Further Action Required

3A Perform Inspection and Test Procedure and Install 4.6 New Transaxle - No Further Action Required - For Olds. Cutlass Ciera and Buick Century Only

Perform Inspection and Test Procedure and Install New Transaxle and adjust toe-in - No Further Action Required

- For Buick Regal, Chevrolet Lumina, Pontiac Grand Prix 5.4 and Oldsmobile Cutlass Supreme with 3. 1L Engine (RPO LHO)

- For Buick Regal with 3800L Engine (RPO L27) 5.8

T1805 Use For Vehicles Inspected Per DCS Message .3 Dated 11-12-91

Time allowance includes 0.1 hour for dealer administrative detail associated with this campaign. Repair code 3A includes $17.00 for 8 litres of transmission fluid. Parts credit will be based on dealer net plus 30% on transaxle case only, part number 8668986 @ $289.74. 30% calculates out to $86.92 to cover parts handling.

SERVICE PROCEDURE:

INSPECTION PROCEDURE

1. Ensure the car has a 4-speed (overdrive) automatic transaxle option. Transaxle shift lever indicator will have an overdrive "OD" and a 3rd gear "D" range if it is a 4-speed automatic transaxle.

NOTICE: It is not necessary to inspect vehicles equipped with 3.4L engines as this powertrain does not use the 4T60 transmission.

2. Raise hood of vehicle and check to see if a black "X" is marked on barrel of case as shown in Figure 3, Page 6. If there is a black "X" on barrel no further action is required. These vehicles were corrected at the plant prior to shipment to the dealer. Install a Campaign Identification Label and return vehicle to customer or dealer stock.

If there is not a black "X" on the barrel, further inspection will be required. Continue to next step.

3. Lift the vehicle following all safety precautions. Ensure the vehicle is properly supported. Inspect the transaxle ID tag (figure 1, Page 5) and case machining stamp (figure 2, Page 6) to determine if the test procedure must be performed.

If Julian date on transaxle is between 282 and 297 (inclusive) AND the last three digits of lower line stamped on transaxle barrel are "504", allow transaxle to cool for at least eight (8) hours, then proceed to "Test Procedure" section of this bulletin below.

NOTICE: Operation machine stamp at end of barrel is stamped on a cast surface and may be difficult to read. If stamp is not legible, "Test Procedure" must be performed on the vehicle if the Julian transaxle date is between 282 to 297 (inclusive).

If Julian date on transaxle is not between 282 to 297 (inclusive) OR the last three digits of the lower line stamped on transaxle barrel are not "504", no further action is required. Install Campaign Identification Label and return vehicle to customer or dealer stock.

TEST PROCEDURE

IMPORTANT: Reverse band drag has been found to be temperature sensitive and may go away once the transaxle is up to operating temperature. The vehicle must sit outside overnight, and should not be run prior to performing the Test Procedure, which follows. If it is necessary to run vehicle prior to performing the "Test Procedure", do not operate vehicle long enough to allow engine/transaxle to reach operating temperature.

1. Jack up the front end of the vehicle following all safety precautions such as blocking the rear wheels and setting park brake so vehicle will not roll. Ensure both front wheels are off the ground, and the vehicle is properly supported. Start the vehicle and put the range selector in Overdrive "OD" and accelerate to 60 km on speedometer.

2. Release accelerator and slowly apply the brakes to completely stop the wheels. Then put the range selector in Reverse (R) and idle for 5 (five) seconds with foot off brake pedal.

3. Slowly apply the brakes to completely stop the wheels and then put the range selector in Neutral (N). With your foot OFF the brake pedal, look at the drive wheels on driver's side of vehicle. The wheels should be stopped, or spinning in forward direction (counter-clockwise) and can be easily stopped by applying resistance. If this is the case, install a Campaign Identification Label and retum vehicle to owner or dealer stock. If this is not the case, proceed to Step 4.

4. If wheel on driver's side of vehicle is spinning in reverse (clockwise), transaxle MUST be replaced. Replace transaxle with same model as shown on transaxle ID plate (Figure 1, Page 5). Proceed to "Replacement Procedure."

TRANSAXLE REPLACEMENT PROCEDURE

1. With ignition in OFF position, disconnect negative battery cable.

NOTICE: Preset memory settings will be lost when battery is disconnected. A memory retention device (such as Kent-Moore tool KS295A; Borroughs tool BT9027; or Snap-On "Memor-Eze" tool YA960) may be used to retain memory functions. If no such tool is available, please write down preset memory settings to be used to reset these functions later when battery is reconnected.

2. Refer to 1992 appropriate Service Manual, Section 7A, for correct transaxle replacement procedures.

NOTICE: Remember to flush transaxle oil cooler and lines as noted in Service Manual. Time for this is included in Labour Operation for transaxle replacement.

3. Reconnect negative battery cable and reset all devices which lost their memory when battery was disconnected.

4. Install Campaign Identification Label.

INSTALLATION OF CAMPAIGN IDENTIFICATION LABEL

Clean surface of radiator upper mounting panel and apply a Campaign Identification Label. Make sure the correct campaign number is inserted on the label. This will indicate that the campaign has been completed.

VEHICLE RECALL NOTICE

December 1991

Dear General Motors Customer.

General Motors of Canada has determined that a defect which relates to motor vehicle safety exists in certain 1992 Chevrolet Lumina, Oldsmobile Cutlass Ciera, Cutlass Supreme, Pontiac Grand Prix and Buick Century and Regal model vehicles equipped with 4-speed automatic transaxles. The reverse servo apply pin may bind in the case which could cause reverse band distress (loss or slipping of reverse), reverse band drag in drive range (poor performance/low power), or the vehicle to remain in reverse while the indicator shows neutral gear position. If the vehicle remains in reverse while the shift indicator shows neutral, and the driver does not apply the brake, the vehicle may unexpectedly move rearward and cause an accident without prior warning.

To prevent this condition, dealers are to inspect and possible test involved vehicles, and if required, install a new transaxle. This service will be performed for you at no charge.

If parts are required, ask your dealer for details regarding their availability. If parts are not in stock, they can be ordered before scheduling your service date.

This letter identifies your vehicle. Presentation of this letter to your dealer will assist their Service personnel in completing the necessary correction to your vehicle in the shortest possible time.

Subsequent to contacting your dealer, further assistance, if required, may be obtained from our Customer Assistance Centre, toll free, by calling 1-800-263-3777 (English), or 1-800-263-7854 (French).

We are sorry to cause you this inconvenience; however, we have taken this action in the interest of your continued satisfaction with our products.

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.