Hi,
Going to pick my 1999 C4 CAB up on Friday and cant wait as been after a Porsche 911 for years. Anyway im pretty handy mechanically and im going to change the front diff oil and also the gearbox oil (is this also the rear diff oil) been looking on opie and just wanted to check these oils were correct, For front diff ( Motul Gear 300 75W90 ) and gearbox/rear diff ( Motul 90 PA)
Thanks guys.

 

just did mine
rear...swepco
front fuchs titan sinopoid


cant tell any improvement from factory fill, maybe in cold weather

 

I used redline...has worked out great for me.