porsche3.2

Hello,

I'm a bit confused around transmission fluids, hope someone can help.

On a 2012 958 GTS, what fluids normally need to be changed apart from Engine Oil and Brake fluid.

I've read things like transmission fluid, clutch fluid, transfer case oil, differential oil.

The OM only refers to transmission fluid change at 16yrs/160k miles.

Thanks for help

Quadcammer

My opinion

Diffs every 30k, especially if towing
Tranny every 50k
Transfer case every 15k

porsche3.2

ok so there is no PDK clutch fluid like in a 991?

CTT-QTR

No. That would be a transmission fluid, like what Quadcammer mentioned, 2 differentials front & rear (if you have a locking/PTV rear differential its fluid is different) the center differential or known as transfer case fluid and the transmission fluid.

I would use all OEM fluids for these. Many reported some differential issues while using different, non-OEM fluids.

porsche3.2

thanks, I don't believe the 958 Cayenne has a locking diff like the 957

CTT-QTR

Mine has it. 958s did come with an optional locking differential. It was the Porsche Torque Vectoring option.

porsche3.2

do u have a special button on the dash for that option.

CTT-QTR

No button for that, but when the rocker is pushed for off-road selection, with the locking diff you would be able to lock all three(three lights will be lit), 1-front, 2-center and 3-rear. Non-PTV optioned 958s I believe are only able to lock 2, the front and center.

Quadcammer

Its just a standard automatic transmission made by aisin. Pdk only in macan or panamera

porsche3.2

do people replace the AT filter too? this is not stated in the service book.

Quadcammer

yes, that should be done during fluid replacement. Easy job, 4 bolts after pan is off

porsche3.2

does pan need to be replace too?

garrett376

The DIY section here can answer everything you're asking, and might not have asked yet:

https://rennlist.com/forums/diy-cayenne-224/

Quadcammer

No

Long Islander

I thought you were supposed to re-calibrate the steering angle also. I think this might only be for cars that have Lane Keeping Assist. Can someone verify this?