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ChrisFu

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Posts posted by ChrisFu

  1. Hello all. I decided to go to my local Porsche dealer (Porsche of Grapevine) and speak with a service advisor there regarding the TC issue and rumors of recent changes to the warranty.

     

    I am happy to report that yes, the TC warranty has indeed been extended by Porsche to 10 years from the date of purchase. This is regardless of mileage. I was also told that the TC replacement unit that will be installed for these warranty coverage services is another new revision that should remedy the failure issues. Time will tell on that, but I was excited to learn that my Cayenne can get a new case for no charge to me.

     

    The only issue is that after all of the repeated oil swaps I have done over the years, the case no longer really exhibits many of the severe symptoms that caused me to attempt to fix myself in the first place. There are a battery of tests the dealer will perform on the vehicle, so I am hopeful that the loud chain noises and occasional hiccup will exceed the threshold for me to qualify - as we all know that anyone with any revision of the current cases are driving timebombs.

     

    (It was also a little humorous when I took my 958 in, as literally zero of the entire dealership staff had ever seen a manual Cayenne, and they were flocking to check it out. It was getting more attention than the 2 $300k speedsters and 918 nearby!)

  2. 6 hours ago, EricP said:

    I had my TC replaced Tuesday, fully covered. I brought it in last month 1 day before the warranty (the new one) expired, talk about good timing! At that, it took several days to get it approved as I do have over 100k miles and even though it is unlimited, they do push back by default on anything with over 100k miles.

     

    NOW I get to see if I will be reimbursed for the 2016 TC replacement I paid for, just waiting for the letter to arrive.

     

    So this new TC warranty coverage is unlimited mileage per what you were told by the service folks you worked with?

  3. 2 hours ago, EricP said:

    Hi All,

    Adding to the list.

    2011 S, 126k miles

    9/15/2016 had the transfer case replaced at a local dealer, 84k miles

    Yesterday was told I need a new transfer case again @ 126k miles. Seems a bit crazy. I have never replaced a transfer case on any other vehicles I have owned. Now 2 in less that 4 years on the same vehicle. 

     

    I have contacted Porsche NA for some sort of relief. I don't have any expectations.

     

    I would also ask, is it crazy difficult to replace myself? I am fairly capable. Also, can I do it on jack stands or does it sort of require a lift?

     

    Thanks,

    -Eric

     

    Eric

     

    Did you attempt a simple fluid change at home first? I would venture that on a new case with only 40k miles on it, the clutch packs probably have plenty of material remaining.

     

    I am the first entry on the thread list when I posted 3 years ago, my Cayenne V6 MT had 105,000 miles on it at the time with terrible jerk and shudder symptoms.

    I replaced with Ravenol TF0870 right away and subsequently annually with every oil change. I am now over 155,000 miles and still driving fine with absolutely no issues (other than an audible bit of chain noise at low speed).

  4. 34 minutes ago, tominboise said:

    I have a more basic question on the changing of the fluid - are most people replacing the drain and fill plugs with new when doing the change?  OR reusing your plugs.  If reusing, are you putting any sealer on the plugs?

     

    We have a 2011 Hybrid S with 85K on it and I plan on changing the fluid this weekend.

     

    I just did this for the 4th time, and have not replaced plugs or applied new sealant, and have never seen any leaks.

     

    Be very careful and do not overtorque on reinstallation. IIRC its 15 ft-lbs.

  5. This weekend I decided to change the rest of the drivetrain fluids, as well as another transfer case fluid swap, and boy was it a bit surprising.

     

    Fluids used: Royal Purple Synchromax (manual transmission), Royal Purple 75w90 maxgear (both diffs), Ravenol TF0780 (transfer case)

    IMG_20170402_143355.jpg

     

    FYI manual transmission and rear diff service essentially requires a fluid pump
    IMG_20170402_155401.jpg

     

    Here is an overview of the fluid condition as removed, versus new fluids behind them (both diffs use the same 75w90 royal purple). Notice the hue of the transfer case fluid which was changed only 2 weeks ago. It did not have the distinct burnt smell of the original fluid, but it was now opaque with suspended friction material. The transmission and gear oils were in fairly good condition, if not a little darker than I expected. No burned odor.
    IMG_20170402_172818.jpg

     

    I poured some of the original oil (likely Porsche OE) versus the 2 week old Ravenol, and you can clearly see the burnt original fluid with clutch material, however even the new fluid was dark with additional friction material in suspension, leading me to believe that there is still significant amounts of that in the case. I believe that after a change the remaining material in the case is distributed over a short time and reduces the effectivity of the fluid (I was noticing slightly more hesitation at the end of the 2 week timeframe). I am considering trying to perform a flush with a gear pump or compressor to remove this buildup, however I am not sure if a solvent or traditional transfer case flush fluid would be harmful to our clutch discs.
    Untitled.png

  6. Year      Model       Mileage       Location    AT/MT    Fluid             Remedy  ForumUserName       
    ------------------------------------------------------------------------------------------------
    2012      V6          105,000       TX, USA     MT       Raveonl TF0870    Y       ChrisFu

    Stumble through 3rd and 4th (similar to a misfire) plus binding/pulsing during low speed high steering angle driving. Fluid change showed very dark, likely burnt oil. Post replacement, 90% of symptoms eliminated - very slight intermittent "slip" feeling at high torque/high RPM in 2nd. Will be replacing all other transmission fluids shortly.

  7. 17 minutes ago, deilenberger said:

    Chris,

     

    I am too - and interested in any correlation between climate and failure mileage.  You're in DFW, from memory - a rather warm part of the US - especially in summer.  Your problem started at how many miles?

     

    Our Cayenne is a northern one owner vehicle (Beachwood Porsche - Cleveland) that we only recently purchased in Janurary @ over 100k miles so it likely hasn't seen much for hot temperatures. I would bet its simply from a lot of highway mileage (supposedly) over the past 5 years the original owner put on it. 

  8. 17 hours ago, pastorom said:

    Sorry, missed this in my original post. I used Redline D4 ATF for the TC fluid. 

     

    I don't think Redline D4 has the proper friction modifiers for the clutch pack transfer case, and I dont see TF 0870 compatibility listed on the specs.

     

    So maybe dont give up hope just yet; I'd try another change with Ravenol TF 0870, Porsche 000-043-301-36, Porsche 000-043-305-63, or Motul DTCF and see if you note an improvement.

  9. Good news to report; I appear to have the same success!

     

    Immediately after the fluid swap I took the Cayenne on a spin to a local industrial park and first of all noticed nearly no detectable stumble through 3rd and 4th (a new experience for me in this car!) on the way over. I followed that by tight figure 8s through a commercial parking lot for 10 minutes or so with no binding, lurch, shudder or anything. This appears to have remedied the 90-95% symptoms immediately, so I guess I will wait with bated breath to determine the longevity of the fix.

     

    Below you can see the immense difference in new fluid color versus what is probably the original lube after 109k miles.

     

    Also, the Ravenol bottle actually has a very handy dispenser that I used in lieu of the OTC Syringe (the tubing included with the syringe was actually too large to fit into the inspection plug hole, whereas the Ravenol was a smaller OD and fit perfectly).

    IMG_20170321_183353.jpg


    IMG_20170321_183409.jpg

  10. 9 hours ago, deilenberger said:

    Cool. I see by your sig that you're well qualified to make a determination. Smell? Other people have noted a burned clutch smell to the oil when it's that dark. It's a bit debatable what color it started out as. I've seen things suggesting the factory fill started out as blue, but all replacement fluids are red. Dunno if that's true or not. Should know in about a week when I get mine changed out.  My guess is what we're seeing is burned clutch material suspended in the fluid.

     

    I'll be very interested in how yours drives now. Being a stick shift we can immediately take slippage of the automatic transmission out of the equation, which is good.

     

    The smell is definitely of "toasted" hydrocarbons, but not as "burnt" as I have smelled from some really bad differential oil changes before (smelled up my whole garage for a week). That being said, those were totally different gear oils as I have never drained an automatic transmission or gearbox that used ATF prior to this so maybe it is indeed on the same level.

     

    ill try to snap a side-by-side of the new oil vs used this afternoon. Also likely going to send some to Blackstone.

  11. 1 hour ago, deilenberger said:

    Chris - no real tricks. It's as straightforward as it sounds.

     

    What year is your wife's Cayenne?  Just curious.

     

    And be very interested in hearing what the result of the fluid change is..  funny thing. When I was at the dealer, looking at a dead transfer-case sitting on the shop floor, I asked about the fluid change. Shop foreman said "Lifetime fluid - never changed" - I just pointed to the dead one on the floor - and said "Lifetime up?"  I think he got it. But they never mentioned ever trying a fluid change before replacing the case. I'm guessing the Porsche protocol is "case misbehaving - replace".. rather than fix.  Just hoping that in at least some cases - changing the fluid may help the problem.  Save a bit of the old fluid coming out - I'd love to see what it looks like from a case experiencing the problem.

     

    BTW - was chatting with my mechanic friend who is pretty hooked into the Ferrari world. He said their dual-clutch transmissions are lasting 5-15,000 miles, and then start exhibiting similar grabby clutch action. Ferrari replaces them - but some enthusiasts have tried RAVENOL dual-clutch-transmission fluid, and reported that within 30 miles or so - the bad behavior starts clearing up. Probably not in all cases - if the clutches really got hammered - but at least in some cases - saves a many thousands of $$ repair.

     

    BTW - Ravenol Transfer Case synthetic, meeting Porsche spec: https://www.amazon.com/gp/product/B00QCVP6UK/ref=ox_sc_act_title_

     

    Cayenne is 2012, purchased from a very high volume Porsche dealer cross country and shipped (we never test drove it, first time Ive ever purchased a car this way). Sure enough, I noticed the bucking problem right away, however it was slight at the time and has progressively become more noticeable.

     

    Strangely enough some days it almost disappears, and some days its rather extreme. Does not correlate with ambient temperature, drive duration, or any other factor save perhaps extra low speed steering time seemed to exacerbate the problem this weekend.

     

    Drained the fluid tonight and have images below. I have seen and smelled worse, but this is pretty dark stuff. No large visible particulate in suspension based on a drip curtain test.

     

    IMG_20170320_211749.jpg
    IMG_20170320_211855.jpg

     

  12. Well count me in, thanks to this thread I am fairly sure we have a failing transfer case on my wife's recently purchased 1-owner 958 V6 6MT (105k miles - her dream car since shes a manual lover like me and cant buy a decent stick SUV anymore).

     

    As I was unfamiliar with Cayenne drivetrain issues, my research made me believe our symptoms were that of the 955/957 cardan shaft which is a thankfully much less expensive fix. Reading the descriptions here and I am almost certain its transfer case related instead.

     

    Slow speed sharp turns result in what feels like a truck stuck in 4WD low maneuvering in a parking lot, a significant binding and noisy feeling. In a straight line the effect is less pronounced, more of a thumping hesitation in 3rd and 4th gear during harder acceleration, however essentially undetectable in 1st/2nd and 5th/6th.

     

    I had planned on taking it in tomorrow for a diagnositc at a local Porsche shop, but now will try a fluid change (Ravenol TF-0870) tomorrow instead

    https://www.amazon.com/gp/product/B00QCVP6UK/ref=ox_sc_act_title_1?ie=UTF8&psc=1&smid=A3NWHGHN360KCD

     

    Will report back with any results. 

     

    Any tricks to the fluid swap? Seemed pretty straight forward in the service manual: Elevate car, remove top plug, remove bottom plug, drain until empty, then refill.

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