HARSH ENGAGEMENT INTO REVERSE (NEW PCM CALIBRATION) MP7 A/T. Saturn Saturn 1992

For 1990-2009 cars

# HARSH ENGAGEMENT INTO REVERSE (NEW PCM CALIBRATION) MP7 A/T

#### SUBJECT: Harsh Engagement into Reverse (New PCM Calibration)

#### MODELS AFFECTED: 1992 SL2 Sedans and SC Coupes equipped with MP7 automatic transaxles and vehicle identification number (VIN) NZ113023 and below. -----------------------------------------------------------------------------

#### CONDITION:

---------- A harsh engagement is experienced immediately after shifting into reverse (R).

#### CAUSE:

------ The harsh engagement into reverse may be caused by a PCM calibration error. This condition has been corrected on vehicles built after VIN NZ1 13 023.

Normally the Saturn automatic transaxle will have a 1-3 second delay before engaging into reverse. If a customer comments on a harsh shift into reverse, with a quick clutch engagement (usually less than one second), then a new calibration may need to be downloaded into the PCM.

#### CORRECTIVE ACTION:

If a harsh/quick engagement is verified, download #2548 PROD TC CALIBRATION using Saturn Service Stall System and the "How To Use SSS EEPROM Reprogramming" procedures in the "SSS User Guide."

#### CLAIM INFORMATION:

To receive credit for this repair, submit a claim through the Saturn Dealer System as follows: Labor Case Operation Type Description Code Time ---- ----------- --------- ---- VW EEPROM Reprogramming T9509 0.2 hrs

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.