vandal968

I've got a new-to-me 2004 Cayenne Turbo, it didn't come with records, 140k. Looks perfect inside and out, runs perfect, put 1000 miles on it in the first two weeks I've owned it. I'm going to change all fluids and go from there. I changed the oil last weekend, went with M1 0W-40

From what I can tell, this thing has half a dozen additional fluids that will need changing. I want the best possible fluid, without going boutique. For example, my 968 lives on M1 15W-50 and RedLine MT-90 for the LSD transaxle. Been my daily driver for 15 years, no issues.

Looks like the Cayenne's got:

Tiptronic Transmission (9.5 qts):

Transfer Box (0.9 qts): (ATF LT 71141)

Front Differential (1.1 qts): (oem is Burmah SAF-AG4 per TSB which supposedly is rebadged Castrol Syntrax Longlife 75w90 (formerly SAF-XO))

Rear Differential (1.5 qts): (oem is Burmah SAF-AG4 per TSB which supposedly is rebadged Castrol Syntrax Longlife 75w90 (formerly SAF-XO))

Locking Rear Differential (1.7 qts) (optional) (oem is Burmah SAF Carbon Mod per TSB)

TSB available to view here (post #8): https://rennlist.com/forums/porsche-...ntial-oil.html

Power Steering (1.6 qts Pentosin CHF 11 S)

Brake Fluid (1.0 qts Porsche brake fluid)

What are you guys using?

I'm hoping to get fluids ordered tomorrow and change them out over the weekend.

TIA,
c

Dilberto

Transmission = Mobil1 3309 ATF
Front/rear Diff = 75w-90 Gear oil(LSD is ok)
Transfer case = Fuchs Titan Sinopoid ATF, or Febi-Bilstein ATF

Petza914

It would also be helpful to those of us that are newer if anyone can list the spec that these fluids need to meet, i.e. Dexron III, etc for each type.

Thanks.

vandal968

That's a good idea. I added the rest of the fluids to the original question as well as adding the required qty. The only fluids that Porsche gives a spec for in the owner's manual are the Power Steering and Brake fluid.

cheers,
c

Petza914

Might as well add PDCC for completeness for those of us that have it, which is the same Pentosin CHF11 as the power steering

Wisconsin Joe

"Instead of."

There's only one rear diff.

It either locks or not.

Most likely not, it's an unusual option.

Easiest way to see if you have it is to push the 'off road" button. 1st push puts it into low range, 2nd push locks the transfer case diff, 3rd push locks the rear diff (if you have it). If the little LED at the back of the diagram of the car doesn't light up on the 3rd push, then you don't have it.

George Boss

I'm about to do all of mine. I'm going to be using:

Engine: M1 0-40 (for now......going to be going with Amsoil within 5,000 miles)
Tranny: Amsoil Signature Series Multi-Vehicle Synthetic (meets LT71141 and Toyota Type IV specs)
Transfer Case: Same as above
Diffs: Amsoil Severe Gear 75w90 synthetic
Brake: ATE SL Dot 4
Power Steering: Pentosin CHF202

nodoors

I would recommend against this. Please do your research fully before deciding not to use the original CHF11s fluid.

vandal968

Don't have it.

Thanks for the explanation.

cheers,
c

killer2001

My 2008 Turbo owner's manual states that CHF 11S or CHF 202 can be used.

deilenberger

I used both with success* on my '06 TiS.. I believe the reason for the CHF-202 recommendation was for some reason for a while the CHF-11S was in short supply.

* = success = no leaks. The P!G did get a new steering rack and power steering pump under CPO warranty due to a strange groaning noise when turning the wheel when the vehicle was stationary. My feeling was - the groaning noise was a mix of the tires chattering on pavement when not moving, and the soft rubber used to mount the steering rack. It made no noise if there was a loose surface under the wheels. The dealer was happy enough to throw parts at it, and since it was CPO I figured new parts are better than 6 year old parts with 70,000 miles on them - if Porsche was paying. The replacement parts made no difference in the noise. It was still there when I traded it in.

George Boss

According to another thread, 11 was replaced, although it's claimed it had something to do with availability.

https://rennlist.com/forums/porsche-...ing-fluid.html

Also, I verified this TSB, so it's all good.

vandal968

Dilberto,
I just read-up on the Mobil 1 3309 for the tranny and that will be my pick as well, thank you. Is there a particular brand of Gear Oil that you like for the Diffs? I don't really see any specs beyond the 75w-90 does GL-4, GL-5, etc not matter since it's just a diff rather than a transaxle?

cheers,
c

killer2001

For differentials, I've always used AMSOIL 80W-90 Synthetic Gear Lube on all my cars that call for 75w-90, plan on doing the same with the Pig.

vandal968

I found this comparison that shows that Amsoil is the best gear oil in the world, not sure how impartial it is though. Amsoil is one of the sponsors of the site where it's posted. In any case, interesting read:

http://www.lastgreatroadtrip.com/wp-...comparison.pdf

As far as my earlier comment regarding GL-4, GL-5. Some reading jogged my memory that GL4 only has an advantage in transmissions with brass synchros, in all-other situations GL5 is superior. So, no reason to consider GL4's when talking about diffs. I'm looking most closely at Amsoil Severe Gear 75w90, Redline 75w90, M1 75w90 and Castrol Syntrax Longlife 75w90 in approximately that order.

Also, I found a Porsche TSB with their specs for the gear oils for the Cayenne. I added that info to the initial post in this thread.

cheers,
c