986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - '99 5 speed trans oil change, why not fill to overflow? why -11mm??

DreamSign · 08-04-2022, 09:47 AM

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?

08-04-2022, 09:47 AM	#1
DreamSign Registered User Join Date: Jun 2022 Location: Sunny Silicon Valley, California Posts: 79	'99 5 speed trans oil change, why not fill to overflow? why -11mm?? 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?