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Stl-986 · 05-04-2021, 05:27 PM

take the engine cover off
look for the AOS
towards the back of the car by the AOS (under the oil fill tube) will be a vacuum line and the change over valve

What your mechanic should do (or you) is hook up a vacuum gauge to the vacuum lines, start the car and see what your vacuum numbers are. Believe it should be between 15-20".

With all that said it is most likely the solenoid but these ZF transmissions are pretty bullet proof.

I would still question the fluid being low. If it was, there has to be a reason why it was low. Also how you check level & fill it isn't the same as doing it on a manual. Still suggest doing a drain, filter & fill.

05-04-2021, 05:27 PM	#4
Stl-986 Registered User Join Date: May 2017 Posts: 1,182	take the engine cover off look for the AOS towards the back of the car by the AOS (under the oil fill tube) will be a vacuum line and the change over valve What your mechanic should do (or you) is hook up a vacuum gauge to the vacuum lines, start the car and see what your vacuum numbers are. Believe it should be between 15-20". With all that said it is most likely the solenoid but these ZF transmissions are pretty bullet proof. I would still question the fluid being low. If it was, there has to be a reason why it was low. Also how you check level & fill it isn't the same as doing it on a manual. Still suggest doing a drain, filter & fill. __________________ 2000 Boxster Tiptronic 2003 Boxster 2003 996 C2 Cab 2002 996 (SOLD) 1986 944 (gone but missed)