Could anyone, that has done DIY differential and transfer-case fluid change, tell me what amount do I need. I'm starting to notice noises from front diff, so I'll change it in all three. Since I have this car for a year now, I think it's time.

 

How many miles are on your car? I have a video on youtube that might be helpful for the rear differential. My car is a 2005 Turbo so don't know if they are the same as your S.

 

I have 132'000Km, it's about 80'000 miles. I've changed AT fluid 3k's from now. But somehow didn't thought about diffs and tcase. I know how to change fluids. I need only amounts. It will be my only car for this weekend, gf will be visiting her parents, so when I pull it up, there's no chance for getting more soup.

 

At 21 seconds I list the fluid and amount that is required. This is directly from the Porsche shop manual.

 

Thank you, Dan!

 

Oh, one more question. Doesn't it, after draining old fluid, needs to be flushed with something to get all particles out, if there is some.

 

No problem! No flushing required. If you're noticing lots of metal shavings that would require flushing you more than likely have a big repair bill coming.

 

I've changed all fluids - no metallic particles, just brownish stinky goo. Although noises were coming from right wheel bearing. So diff is fine, I guess.

 

Sounds like your diff it healthy. Wheel bearing does not sound fun! Enjoy!

 

I finally did a front differential fluid change video for our cars. You will need to modify (cut down) a 8mm allen in order to remove the fill plug. Good luck!