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My garage is having trouble locating fluids for the transmission and the transfer case (2011 Cayenne S). All they see is that it "has to be Porsche fluid" but it gives no specifications on it at all!!! The dealer wants $120/litre!!!! WTF!!! Does anybody have alternatives for these fluids or at least the specifications or part numbers so that my garage can cross-reference? There has to be something else out there.

 

Thanks in advance.

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Welcome to the land of Porsche's, were gear box and transfer case fluids often have very peculiar specs and are often produced to Porsche's specs.  People regularly use other products, some seem to work OK, others not so much.  We only use the Porsche products as we (and our customer's) have never had an issue as the result.

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FWIW

 

I used various flavors of Ravenol when I changed the fluids on my TC and diffs. The next time around I'll use the Porsche branded fluid for the TC but I picked it up for $38 shipped. You can find deals if you search. For my Transmission I used Febi 29934 @ ~$10 per liter. There's a long DIY on rennlist which discusses fluids and cross references for the AT as well as all the other parts needed to do the full service for the AT.

 

https://rennlist.com/forums/cayenne-diy/1018243-958-cayenne-diy-changing-atf-fluid.html

 

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