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Removal and Replacement

WM 387719 Removing and installing electrohydraulic control unit








Information

Notes

Note
Fill only with ATF approved by Porsche. See Spare Parts Catalogue.

Note
Hot vehicles should cool down before beginning the activity.

Note
Vehicle must be horizontal in order to be filled and checked.

Technical values

Filling capacities





Preliminary work

Preliminary work
1. Move selector lever to position P.
2. Raise the vehicle at the prescribed jacking points.
3. Remove the underbody panels.
4. Place oil collection pan under the transmission.

Draining ATF

Caution
Oil fill level too low
^ Risk of damage to components

--> Do not start engine.
--> Do not tow the vehicle.

Warning
Danger of scalding and chemical burns from hot ATF

--> Allow ATF to cool down
--> Wear personal protective gear (goggles, gloves)

1. Unscrew the drain plug -1- and drain the ATF.





2. Replace sealing ring for drain plug and tighten screw. --> Tightening torque: 22 Nm (16 ftlb.).

Removing the electrohydraulic control unit

Dismantling
1. Remove cross member.





2. Disengage the coolant lines at the fastening points.





3. Remove electric plug.





4. Disengage cable and vacuum line from the retaining clips of the ATF pan.
5. Disengage the coolant hoses in the area of the left drive shaft.





6. Pull vacuum line off the switch-over valve.
7. Undo the left drive shaft on the transmission side.
8. Remove the holder for the coolant hoses.





9. Unlock electrical plug connection by turning it counter-clockwise and pull out electrical plug.





10. Unscrew guide bush fastening screw with assembly aid 9663 and pull out bush.





Removing the electrohydraulic control unit
1. Loosen screws crosswise and remove ATF pan.





2. Disconnect ATF filter downwards from electromagnetic control unit.





3. Unscrew fastening screws -Pfeil- for electromagnetic control unit and remove control unit.





Installing the electrohydraulic control unit

Installing the electrohydraulic control unit

Note
The selector lever must be in position P in order to fit the electrohydraulic control unit.

1. Insert electrohydraulic control unit into the transmission from below. The selector valve must engage in the driver of the notched plate.





2. Screw in fastening screws and tighten hand tight.





3. Tighten fastening screws.





4. Thinly coat gasket on the suction collar of the ATF filter with Vaseline and insert filter from below into electromagnetic control unit.





5. Clean ATF pan and place on transmission with new seal.
6. Screw in screws and tighten them crosswise. --> Tightening torque: 8 Nm (6.0 ftlb.)

Assembly work
1. Insert the socket with new seals in the correct position and tighten the fastening screw.








2. Insert electrical plug into socket and lock by turning clockwise.





3. Fit the holder for the coolant hoses.








4. Fit left drive shaft on transmission side.





5. Push vacuum line onto switch-over valve.
6. Engage the coolant hoses in the area of the left drive shaft.





7. Engage cable and vacuum line in the retaining clips of the ATF pan.
8. Fit electric plugs.





9. Engage the coolant lines at the fastening points.





10. Install cross member.





Subsequent work

Topping up ATF

Caution
Oil fill level too low
^ Risk of damage to components

--> Do not start engine.
--> Do not tow the vehicle.

Note
To undo and tighten the cap nut for the charging valve, counter with a ring wrench!

1. Unscrew control screw -2-.





2. Screw off cap nut -1- for the charging valve.





3. Screw connection hose 95071 onto charging valve.





Warning
Danger of scalding and chemical burns from hot ATF

--> Allow ATF to cool down
--> Wear personal protective gear (goggles, gloves)

4. Top up ATF via the charging valve until ATF runs out at the control bore.

Checking and topping up the ATF
^ The transmission must not be in the reduced driving program.
^ The ATF temperature must be between --> ATF temperature: 30 degrees Celsius and --> ATF temperature: 40 degrees Celsius. An ATF inspection when the temperature is too high causes insufficient filling, while an inspection when the temperature is too low causes over-filling.
^ The selector lever must be in position "P" and the engine must be idling.
^ The air conditioning must be switched off.
^ The vehicle must stand horizontally.

Note
The ATF temperature at the start of testing must not be higher than --> ATF temperature: 40 gradCelsius.

1. Connect the PIWIS Tester 97180 and call up the ATF temperature.
2. Put selector lever in position "P", start vehicle, and allow engine to idle.
3. Top up ATF via the charging valve until ATF runs out at the control bore.
4. With the brake pedal pressed, change through all selector lever positions, remaining in each position for approximately --> Time: 10 s.

Warning
Danger of scalding and chemical burns from hot ATF

--> Allow ATF to cool down
--> Wear personal protective gear (goggles, gloves)

5. Top up with ATF again via the charging valve until ATF runs out at the control bore.

Reworking
1. Unscrew connection hose 95071 from ATF - charging valve.
2. Replace sealing ring for cap nut and screw on cap nut. --> Tightening torque: 30 ftlb.
3. Replace sealing ring for ATF control screw and screw in ATF control screw. --> Tightening torque: 16 ftlb.
4. Fit underbody panels.
5. Lower the vehicle.
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