Don't hold me to this - I didn't do the research - this is from a long thread on Rennlist by someone else:

Porsche TSB 2/04 3965 X-fer case oil spec:

Esso ESSO Mobil ATF LT 71141 Spec.
cSt @ 40º C 37.2
cSt @ 100ºC 7.4
Viscosity Index, ASTM D 2270 168
Density @15º C g/ml, ASTM D 4052 0.855
Flashpoint 219 Celsius

Possible ATF alternatives (so far, still researching)

Ravenol
Porsche OEM "63"
Royal Purple documented LT 71141 -> yes, flashpoint http://www.royalpurpleconsumer.com/p...mission-fluid/
Liqui Moly Top Tec ATF 1200 ->documented LT 71141 - Yes, https://products.liqui-moly.us/top-tec-atf-1200-1.html
Amsoil - documented LT 71141 -> yes, flashpoint 234 cel. http://www.amsoil.com/shop/by-produc...mission-fluid/
Redline D4 ->documented LT 71141 - yes, flash point https://www.redlineoil.com/content/files/tech/ATF%20PDS%202-10.pdf
Redline High Temp ATF Flash Point 235, DexronIII equiv.
Motul -> documented LT 71141 -> yes, flashpoint 218 cel. https://www.motul.com/us/en-US/products/multi-atf--2
FUCHS TITAN ATF 5005 ->documented LT 71141 - yes
Shell TF-0870 ->documented LT 71141 - yes
Brad Penn ->documented LT 71141 - yes
Pentosin ->documented LT 71141 - yes
Castrol Edge
Swepco 201 ->documented LT 71141 - yes
Penzoil - Max Life ATF

I do know people used the Fuchs Titan successfully.

 

Here's the OEM fluid spec and Driven equivalent that's in my 09 Turbo S along with other related info like torque specs. I've done everything but the transmission so far.

CAYENNE FLUIDS (vs OEM)
Tiptronic Transmission (9.5 qts):
Driven AT3 (DEXRON 3 synthetic ATF)

ATF filter -> 10 Nm / 7.5 ft.lbs.
ATF pan -> 10 Nm / 7.5 ft.lbs.
M24 inspection (fill) plug -> 70 Nm / 52 ft.lbs.
Drain plug -> 28 Nm / 21 ft.lbs.

Transfer Case (0.9 qts): (ATF LT 71141)
Driven AT3 (DEXRON 3 synthetic ATF)

Front Differential (1.1 qts): (oem is Burmah SAF-AG4 per TSB which supposedly is rebadged Castrol Syntrax Longlife 75w90 (formerly SAF-XO))
Driven LS75W-90 Gear Oil

Rear Differential (1.5 qts): (oem is Burmah SAF-AG4 per TSB which supposedly is rebadged Castrol Syntrax Longlife 75w90 (formerly SAF-XO))
Driven LS75W-90 Gear Oil

 

Thank you thank you Don......missed you on rennlist!! You had helped me way back in 2013 I think on some coding issues.

 

Thank you @Petza914
The diff oil is not available in India.
What are the alternatives?
What is the recommended mileage/years before we change the diff oil.
India is very heavy on vehicles due to constanr braking and stop and go crawling traffic

 

No idea what's available in India. I changed all mine at 40k miles regardless of what the recommended service interval is.

 

ok did a quick search. We have diff oil 75w-90 but not the LS variant.
Will search some more. Would non LS variant work ok?

 

If the car has a limited slip differential it has to have LS rated fluid or it will destroy the clutches inside. You can use LS fluid in a non limited slip differential, but not the other way around.

 

I didn't and haven't read this whole thread, although I've likely referenced it in my searches. I made a post on RL, but thought I'd leave a note here too. I thought I'd add that my transfer case has just been replaced under warranty with 115k miles. It seems Porsche did in fact extend the warranty.

My RL post.
https://rennlist.com/forums/cayenne-...tem-fault.html

If you get the following codes, you likely need a new transfer case.

I tried a new battery and a new servo motor and didn't fix it.

C1208A – “check PASM control unit fault memory content”

000125 – “PSM activation by all-wheel drive control”

000114 – “all-wheel drive service life reached”

000117 – “Service life, all-wheel drive”

 

I realize this is a necro-thread (bringing a long dead thread back to life..) but my transfer case finally went **** up I believe - today.

I had it at my friendly local mechanics getting an oil change and when I went to back it out the driveway it felt a bit odd. I went to move it to a parking lot near the shop, and was going back in for the Memorial-Day-Weekend luncheon (hot-dogs, hamburgers, Boars Head.. he has a Ferrari customer..)

It felt like it slipped on ice for a second. I then tried to accelerate forwards, and it lurched again, and I get wheels binding up, fighting each other. A warning appeared on the dashboard "4-Wheel Drive Fault".

I nursed it back to his lot, went in and got his Foxwell diagnostics tool and started looking. There were three errors; PASM disabled, error. Transfer clutch #1 overheated. Transfer clutch #2 overheated. I cleared the codes, tried driving it the length of his driveway and back, and the errors immediately reappeared. There was no way it was overheating since it had only been running for a few minutes in the driveway. I repeated the reset and code reappearance several times (definition of idiocy repeating the exact same action and expecting a different result) - and it kept faulting.

So - it's sitting in his parking lot. He's coming in tomorrow morning, and I've passed along the test of disconnecting the plug to the case, and we'll see if that clears it up, meaning it's the case. Since I'm over the 10 years by 2, and over 100,000 miles by 10,000 - I doubt if Porsche will do anything for me, but I'll ask on Monday. When they say no - I've checked prices. The discount Porsche dealers selling parts - about $3,500 (some with free shipping.) I found PartsGeek and AutohausAX list them for around $1,700 delivered to my mechanic's shop, and I imagine that's the route I'm going. 3 year parts warranty from both places and that's longer than I'll own this car...

Oh well.. see what happens, I haven't changed the fluid in about 30,000 miles.

 

Good luck. For a bit, that wheels binding problem sounded like another warranty issue with the wheel speed sensors.

 

I just got mine done under warranty in January at 120k miles. I had read somewhere that Porsche extended the transfer case warranty, so I took it in under the guise of paying them to troubleshoot my "AWD system fault", and they said they would replace my transfer case under warranty. I tried EVERYTHING to get the light to go off, to no avail.

 

Great to know - was your's driveable? Mine definitely isn't.

 

Interesting thought. I replaced a wheel-speed sensor about 200 miles ago. With a Chinese one. MAYBE I should go for a OE one and see if that makes a difference. When the wheel sensor went bad, I was doing 70MPH on the highway and bong, bong, bong accompanied by messages about each system that was shutting down. When I hooked it to my diagnostics tool - the PSM module was reporting "Improbable signal from right-rear wheel speed sensor" - and all the other systems that shut down were ones that depended on knowing the speed of all the wheels.

Wonder how I might troubleshoot that..

 

Apparently - you're exactly correct. Eilenberger's Law #8 - the Law of Parallelism was at work here.. http://www.eilenberger.net/laws.htm

About 2 weeks ago I had a wheel speed sensor fail while driving. Almost all the speed-related systems in the car posted error messages, and finally looking at the PSM codes it told me the right-rear-wheel sensor had gone to sensor heaven. SO - I replaced it. I hadn't taken into account Law #8... when the latest happened, since the symptoms were a lot more severe. Apparently the PSM system REALLY doesn't like it when a front wheel-speed-sensor fails. A diagnostics session this AM with my Foxwell NT530 showed messages in all speed sensitive modules telling me to look at the errors in the PSM module. So I did - and the primary error was the right-front wheel-speed-sensor. I double-checked it by watching the readout from the sensors (you can graph them) while driving in my friends shop parking lot - and the sensor was kaput. Dead. Nailed to the perch so to say.

I have 4 new ones on order from FCP-Euro. I went with the mid-priced ones (about $24/each) rather than the higher priced ATE ones ($70/each) or the Porsche ones (which undoubtedly are ATE made) for $140/each. I expect they'll be to the shop by Wednesday, and hopefully will fix the issue.

I'll report back after they're installed. It seems a shame that I have the failure after the extended warranty on them expired (10year/100k miles), but it's still much better than paying for a transfer case.

@nhirsch - thanks much for jogging that memory for me.. I think you saved me a whole bunch of money and tribulations.

 

So glad that helped. Appreciate your contributions in the Porsche group forum(s) all these years.