Valve Body: Service and Repair

Removing and Installing/Replacing Selector Unit
(A5S 360R / 390R, A4S 200R)

Note: After completion of work, check transmission fluid level.

Caution! Use only the approved transmission fluid in this automatic transmission.

Failure to comply with this requirement will result in serious damage to the automatic transmission!

Remove and install transmission fluid sump, refer to Fluid Pan, A/T, Service and Repair.

Remove and install/replace transmission fluid screen.





Disconnect all plug connections on shift unit.

Unclip temperature sensor (1) from holder.

Note: As of model year 2001 (04/2000), the temperature sensor will be integrated in the wiring harness.





Caution: Do not release screws (1).

Release all other screws, with outside torx E8, on shift unit and remove shift unit.

A5S 360R (GM5) transmission:





Pull out seals (1), (2) and (3). Coat new seals with automatic transmission fluid and install.

A4S 360R (GM4) transmission:
Pull out seals (2) and (3).
Coat new seals with automatic transmission fluid and install.

Caution! Transmission A4S 360R (GM4) without gasket (1).

Installation:





Blow out tapped holes with compressed air gun.
Insert set screws (1) from seal set into tapped holes.





Length of screws:
(1) = (2) = 68 mm, all others = 58 mm.

Insert shift unit with aid of both set screws and secure with screws.

Remove both set screws.

Tighten all screws until it is hand tight.

When tightening screws: follow sequence without fail.

Tightening torque, refer to Specifications.

Do not tighten screws (1) and (2) yet.





Attach guide (1) of transmission switch to detent spring (2).

Caution! Journal (3) of detent disk must be located in groove (4) of slide valve.





Insert feeler gauge (1) between detent spring (2) and detent disk (3) and adjust gap of 0.80 mm by moving detent spring (2).

Tighten down screws (4).

Tightening torque, refer to Specifications.