Repeatable Engine Flare, Loss of Performance, Delayed and/or Harsh Engagement into Reverse. Saturn Saturn 1995

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.