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For 1990-2009 cars

Repeatable Engine Flare, Loss of Performance, Delayed and/or Harsh Engagement into Reverse

Subject:Repeatable Engine Flare, Loss of Performance, Delayed and/or Harsh Engagement into Reverse (Replace Damaged Piston Seal)

Models:1995 Saturns equipped with MP6 or MP7 automatic transaxles



Condition

Some customers may comment of a repeatable engine flare, loss of performance, delayed and/or harsh engagement into Reverse and malfunction indicator lamp (SERVICE ENGINE SOON telltale lamp) may be illuminated. Diagnostic trouble codes (DTCs) may be stored in the PCM memory as a result of this condition.

These diagnostic trouble codes may be DTC 22 (no 2nd gear), DTC 23 (no 3rd gear) and/or DTC 24 (no 4th gear). DTCs may be set at any transaxle fluid temperature.

Cause

The conditions may be caused by a pistol seal that may have been damaged during automatic transaxle assembly.

Correction

When diagnosing diagnostic trouble codes 22, 23, or 24, follow the procedures in the "Automatic Transaxle Service Manual" corresponding to the appropriate diagnostic troubles code (s). When diagnosing a delayed and/or harsh engagement into reverse, with no DTC present, refer to the diagnostic chart in this bulletin.

Important: A delay and/or harsh engagement into Reverse may be caused by a small leak at the 2nd/Reverse piston seal which does not appear to cause any problem in the application of the second clutch. A no reverse condition may be caused by a large leak at the 2nd/Reverse piston seal. Damaged piston seals do not normally cause automatic transaxle clutch failures.


Object Number: 885445  Size: FP

Object Number: 885476  Size: FP