Checking ATF

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

Fig 1: Identifying Control Screw (As Of MY 2002)

Courtesy of PORSCHE OF NORTH AMERICA, INC.

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.

Place oil collection pan under the transmission.
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.
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 chemical burns to the eyes! Wear protective goggles.
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.

Fig 2: Removing Control Screw (As Of MY 2002)
Courtesy of PORSCHE OF NORTH AMERICA, INC.
If no oil escapes from the control bore even though approx. 40 °C has been reached, the ATF must be topped up. (See Topping up ATF .)
NOTE: The control screw must be closed no later than when an ATF temperature of 45 °C is reached.
Screw in ATF control screw with a new sealing ring
Tightening torque: 22 Nm (16 ftlb.)