Fluid - A/T: Testing and Inspection

Tools

Note: Top up only with approved ATF.





Note: The stipulated fluid level is extremely important for perfect functioning of the automatic transmission. It is correct it there is a slight amount of ATF escaping at the control screw bore -B- at temperatures between 30°C and 40°C.


Testing conditions:
^ The transmission must not be in the reduced driving program.
^ The ATF temperature must be between 30°C and 40°C. An ATF inspection at an insufficient ATF temperature causes over-filling and an inspection at an excessive ATF temperature causes insufficient filling.
^ Selector lever in position "P" and engine idling.
^ The air-conditioning system and the heater must be switched off.
^ The vehicle must stand horizontally.

1. Place oil collection pan under the transmission.
2. Connect the Porsche System Tester 2 and call up the ATF temperature.

Note: The ATF temperature must not be higher than 40°C at the start of the test.

3. Move selector lever to position "P" and allow engine to idle.

Warning:
^ Danger of injury from emerging ATF fluid.
^ ATF fluid can cause burns and causticisation to the eyes.
^ Wear protective goggles





4. Unscrew control screw -B- If ATF escapes from the control bore and if the ATF temperature is 30°C to 40°C, the ATF level is in order. If there is enough ATF fluid in the transmission, then continue with step 10.

Note: The control screw must be closed no later than when an ATF temperature of 45°C is reached.

5. If no ATF escapes from the control bore even though approx. 40 °C has been reached, the ATF must be topped up.

Note: To undo and tighten the cap nut for the charging valve, counter with an open-ended wrench.

6. Screw off cap nut for the charging valve.





7. Screw special tool 9507/1 -A- onto the charging valve and top up ATF via the charging valve until excess ATF emerges at the control bore.
8. Replace sealing ring for cap nut.
9. Screw on cap nut for charging valve.
10. Screw in the ATF control screw with a new sealing ring and tighten it to 20 Nm (15 ft. lbs.).

Tightening torques
Location Thread Tightening torque Nm (ft. lbs.)
Drain plug on ATF pan M10 20 Nm (15 ft lbs.)
Control screw on ATF pan M10 20 Nm (15 ft lbs.)
Cap nut to charging valve M14 x 1.5 20 Nm (15 ft lbs.)