DELAY AND/OR HARSH ENGAGEMENT INTO REVERSE AND/OR NO REVERSE. Saturn Saturn 1993

For 1990-2009 cars

# DELAY AND/OR HARSH ENGAGEMENT INTO REVERSE AND/OR NO REVERSE

#### SUBJECT: Delay and/or Harsh Engagement into Reverse, and/or No Reverse when Vehicle is Warm (Replace Automatic Transaxle Upper Control Valvebody Assembly) -------------------------------------------------------------------

#### MODELS: 1993 Saturns equipped with MP6/MP7 automatic transaxles -------------------------------------------------------

#### CONDITION

Delay and/or harsh engagement into reverse, and/or no engagement into reverse when the vehicle is warm. Also, there could be repeat failures of the pressure filter seal, causing the transaxle fluid to leak. These conditions may be caused by a broken line pressure regulator valve cushion spring (orange in color) in the automatic transaxle control valvebody pressure regulator valve. Cushion spring failures may cause line pressure to be above or below normal line pressure specifications. If line pressure is above the normal maximum pressure, it may cause the automatic transaxle pressure filter seal to leak.

#### CORRECTION:

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Diagnose this condition by using the attached diagnostic chart. If while following the diagnostic chart, it is necessary to inspect for a damaged line pressure regulator valve assembly, refer to the procedure in this bulletin.

#### PROCEDURES

#### Valvebody Disassembly

1. Remove the automatic transaxle control valvebody assembly. (Refer to 1991-1994 Automatic Transaxle Service Manual).

2. Remove detent arm.

3. Remove actuator cover-to-valvebody bolts (identified by heavy circles) and remove actuator cover.

4. Lift actuator connector plate off actuator pins using care not to damage connector plate.

5. Remove actuators by using twisting motion as the actuators are removed.

6. Remove bolt retaining two halves of valvebody.

7. Separate upper valvebody from lower valvebody.

8. Remove spacer plate and transaxle check balls.

#### IMPORTANT: Note position of transaxle check balls when taking two halves apart.

#### Valvebody Disassembly

#### CAUTION:

IN ORDER TO AVOID PERSONAL INJURY OR INJURY TO OTHER PERSONNEL, WHEN REMOVING THE LINE PRESSURE RECUIATOR VALVE MAKE SURE VALVE IS POINTED TOWARD TABLE AND THAT NO PART OF THE HAND IS BETWEEN THE VALVE AND THE TABLE.

1. Hold upper valvebody so that end of the line pressure regulator valve is directed toward the table.

2. Remove the line pressure regulator valve retainer.

3. Using a screwdriver, gently push the line pressure regulator valve sleeve out of the bore, being careful not to damage the sleeve 0-rings.

#### IMPORTANT: Spring force will cause valve to exit from valvebody rapidly.

4. Once the valve has been removed, remove other valve components shown in the illustration on facing page.

* If a broken spring exists, replace the upper valvebody assembly using P/N 21005949 and proceed to step 3 of Valvebody Assembly in this bulletin.

* If the spring is not broken, reassemble the valvebody according to Valvebody Assembly procedure in this bulletin.

Refer to "Delay or Harsh Engagement into Reverse" diagnostic chart in the "1996 Revised Automatic Transaxle Service Manual." (Make sure to refer to the 1996 Service Manual.)

#### Valvebody Assembly

#### IMPORTANT: Be sure all parts are clean and free of lint and dirt. Valvebody should be assembled in a clean area.

1. Install valvebody components according to illustration on facing page.

2. Compress spring on valve train and install line pressure regulator valve retainer.

3. Install new spacer plate gaskets on spacer plate.

4. Install two transaxle check balls in lower valvebody, on top of springs (refer to illustration on facing page).

5. Install spacer plate on top of lower valvebody and transaxle check balls.

6. Install transaxle check ball on top of spacer plate.

7. Position two halves of valvebody together and install the one bolt holding the two halves together.

#### IMPORTANT: The dowel bolts must be placed in the holes shown to align the upper valvebody to the lower valvebody.

Torque: 11 N-m (97 in-lbs)

8. Lube actuator 0-rings.

9. Install actuators using a twisting motion.

10. Check connector plate terminals with a #43 (2.25 mm) drill bit. There should be a slight drag on the shank. If there is no drag, replace the connector plate.

11. Align the actuator pins to the connector plate.

12. Install the actuator cover.

13. Install return exhaust diverter.

14. Install the actuator cover bolts and finger tighten.

#### IMPORTANT: Clean and lubricate all bolts with Saturn Transaxle Fluid. Wipe off excess fluid and install bolts.

#### NOTICE: Over -torquing bolts can cause valves to bind.

15. Torque actuator cover bolts using torque sequence shown.

Torque: 11 N-m (97 in-lbs)

16. Install detent arm and bolt.

Torque: 11 N-m (97 in-lbs)

#### IMPORTANT: If parts were replaced to repair a line pressure condition, use the Saturn service stall system (SSS) to reset the adaptives before driving vehicle.

17. Install valvebody according to procedures in the " 1991 - 1994 Automatic Transaxle Service Manual."

18. Install valvebody cover using Loctitelt 515 Gasket Eliminator Sealant (P/N 21005993) or equivalent. (Refer to Technical Information Bulletin 95-T-25A [corporation number 587102R] for information on using Loctite's 515 Gasket Eliminator Sealant or equivalent for valvebody cover installation.)

#### PARTS REQUIREMENTS:

21005949 Kit-Upper CNIV Body - includes: 21005944 Assy- Upper C/Vlv Body (Qty 1) 21002390 Gasket-Spacer Plate (Qty 2) 21001683 Gasket - CNIV Body Cvr (Qty 1) 21002183 Diverter-Actr Ret Exh (Qty 1)

21005993 Sealant-Loctite" 515 Gasket Eliminator or equivalent

#### CLAIM INFORMATION:

To receive credit for this repair during the warranty coverage period, submit a claim through the Saturn Dealer System as follows:

Labor Case Operation Type Description Code Time ---- ----------- ---------- -----

VW Replace Automatic Transaxle T9705 2.5 hrs Upper Control Valvebody Assembly

Add: With ABS 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.