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Home >> Porsche >> 2000 >> Boxster (986) F6-2.7L >> Repair and Diagnosis >> Transmission and Drivetrain >> Automatic Transmission/Transaxle >> Valve Body >> Service and Repair >> Hydraulic Control Unit
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Hydraulic Control Unit







Removing and installing hydraulic control unit














Notes on removal and installation

Note Do not let engine run with the ATF pan removed or without ATF filling.

Removal
1. Remove transverse member panel.
2. Unscrew ATF drain screw and drain ATF fluid.
3. Remove ATF pan (loosen screws crosswise).





4. Remove ATF filter.





5. Pull off securing clasp for wiring harness plug.





6. Pull off plugs for transmission speed sensors.
7. Unscrew fastening screws for hydraulic control unit.





Note Only the marked screws may be unscrewed.

8. Take hydraulic control unit off transmission and follow up wiring harness plug.

Note Do not lay removed hydraulic control unit on the sensor for transmission input speed at the reverse side of the hydraulic control unit. This could damage the sensor.

Installation
Install in reverse order, observing the following points:
1. Thinly coat toroidal sealing rings for wiring harness plugs with Vaseline and insert plug into transmission housing.





2. Carefully put on hydraulic control unit and insert the pin of the detent disc (1) into the groove of the selector valve (2).





3. First tighten screws for hydraulic control unit (arrows) hand tight. Then tighten to 8 Nm (6 ft. lbs.) from inside outwards.





4. Push on securing clasp for wiring harness plug and let holding tongue engage.
5. Thinly coat gasket on the suction collar of the ATF strainer with Vaseline and install strainer.
6. Replace gasket for ATF pan.
7. Clean all four magnets in the beads of the ATF pan and ensure there is contact over the full area of the ATF pan.
8. Tighten screws of the ATF pan crosswise in several stages.
9. Top up ATF fluid.
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