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Old 08-04-2022, 10:37 AM   #3
JFP in PA
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Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,561
Quote:
Originally Posted by DreamSign View Post
I'm planning on changing the trans oil in my '99 base model 5 speed.
I bought 3 liters of the 'special sauce' at my local Porsche dealer.

I see in the 101 projects it says to fill to 11mm below the fill hole, but online videos (youtube) say nothing wrong with filling until overflow.

Is there any problem with simply filling until overflow? Did the engineers make the fill hole too high? or is it completely fine to fill until overflow?
Yes, filling it until it overflows will most likely allow gear oil to leak out the front input shaft bearing of the trans where it will destroy the clutch. The fill spec exists for a very good reason.
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