Mrg02D

Like a boss!

CAVU

Don,

Found it in my files. Per Porsche Communication, October 20, 2016 (see attached). I used this to REMIND my dealer that they had to R&R the transfer case that had just been replaced under warranty and did not install the "kit". Then they cracked the case as part of a requested transfer oil change and I got a whole new transfer case with all the proper kit...and fresh oil.

Also, FYI. Potential electrical connection issue addressed by attached Porsche Communication.

jd-gt-350

Received my need fluids last week and did the fluid change...very easy. I had not experienced any problems but did the change any way. I am now @ 70k miles.
thanks
Jim

rich022

I changed my fluid out too with Ravenol but did not add the FM /friction modifier. Necessary?

Tom M

I used Ravenol when I changed the TC factory fill fluid a while back and noticed a big improvement. This time around I used the Porsche fluid since I got a deal on it and also added the Ford FM. After ~2K miles on it the 1-2 & 2-3 shifts are a bit smoother. Whether it's due to the FM or just the Porsche fluid I have no way to tell.

jtakhtalian

Tom,

How much Ford Friction Modifier did you mix into the transfer case fluid? I used the stuff in my front and rear differential and the car feels smoother when accelerating and coasting. I basically used about 3.5 ounces for the front and another 3.5 ounces for the rear.

Mark7000

This whole transfer case issue reminds me of the issues with Honda and the CR-V. (I was also a service advisor way back when).

They use an extremely similar design with the clutch pack and Honda had specified 105k miles before a fluid change was needed. People soon figured out that changing the fluid every 30k miles made the clutch pack happy to the tune of 250k+ miles with no issues. Honda quietly began a campaign to simply change fluid if a customer came in with the symptoms, even after the warranty was out.

The clutch pack on the Honda was $1100 at the dealer - as opposed to $4000 from Porsche. I will grant that the Porsche has a lot more torque going thru the clutch pack and probably wears that fluid out even faster.

I just bought a 2014 S with 80k miles and will not be changing the fluid as I have a full CPO 2 year unlimited mileage warranty that just started. I hope to get that new transfer case just before the warranty expires, after which, I will change fluid annually.

Tom M

I used the entire 4 oz bottle for the 850ml. I let them both heat up in the sun a bit and then dumped it in and shook well to ensure it was thoroughly mixed.

deilenberger

I'll repeat what I noted before - unless you NEED the friction modifier, I would avoid using it. There are two possible clutch failure modes in the transfer case. Sticky clutch (probably caused by rust from moisture in the fluid) or a worn/slipping clutch. The symptoms will feel different. A sticky clutch will feel like a ratchet engaging on acceleration - probably in 2nd and 3rd gear. This seems to be the most common failure. A slipping clutch fill show some flare when you shift - ie RPM increase without a corresponding speed increase.

If you have a worn slipping clutch (which may have been caused by a sticky clutch) - the friction modifier is likely to make it worse. I suspect the worse is reversible if you changed the fluid again and didn't add the modifier. My suggestion would be - change the fluid. Drive it for 500 miles and see if your problems go away. If they do - fine - you're done and just plan on regular changes. If they are still evident - you could try adding an ounce or two of the friction modifier and see if the symptoms get better.

There is NO hard and fast rule on this - everything suggested is the result of people here trying things and reporting on what worked and what didn't. No one can say 1.24568 Oz of fluid is the perfect number, because we simply don't know - and your failure may be much different from someone elses.

It's really a case of YMMV - but proceed cautiously and do no harm.

Delphis Richard

It called Friction modifier code XL3

Cayenne2012S

My 2012 Cayenne S was starting to shudder/stutter when accelerating. Spoke to the dealership and they said it was a known problem and wanted to check out the vehicle but it was likely a transfer case failure which would cost $5000 to replace. I poked around online and decided to change the transfer case fluid and transmission fluid at my non dealer Porsche repair shop (The Porsche Specialist - Philadelphia area). The shuddering is gone and my bill was under $300. I'm sure replacing the entire transfer case would have also fixed the problem...

CPS

The dealer explained that the (fluid) was interfering with the communication between the manual gear and transmission. My car did well on 4 wh drive but was hesitating in 2 wh drive. I knew it wasn’t the accelerator petal but suspected the transfer case.

deilenberger

Huh? I'm going to file this under stupid things dealer staff tell people to avoid telling them "I don't know.." - Totally made up BS. Manual gear and transmission? HUH?

BTW - welcome to the forums! This post wasn't to drive you off - but to warn you dealer employees often spout total BS when asked questions they don't know the answer to. They're trying to maintain their reputation as an "expert" - when they state things like this one did to you - it just points out their ignorance in how a transfer case works.

edde

Word salad comes to mind.

FrankLee

I just changed the fluid and which is worked for me!

39000miles, 2015 cayenne S. Feeling jerky move during low speed(gear1-gear3).

Thank you all for the advice here!