Jump to content

Server Lease Renewal/Software Licenses

Our yearly server lease, software licenses, as well as hardware operating costs, ARE due Dec 6th, 2021. Our current donations have fallen far short of the funds we need to renew. Please remember the RennTech.org community is Member supported so please consider a donation to help...  THANK YOU!

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

04 Cayenne Turbo transmission "clunk"


Recommended Posts

I recently purchased an '04 Cayenne Turbo with 24k miles.

Test driving the vehicle didn't display anything of what I am about to describe...

Most often, 4th gear upon acceleration (rarely on deceleration) bump, hiccup and associated "clunk".

Consistent issue with downshift under acceleration. Dominant in 5th-3rd downshift, but also present in 4th-3rd in acceleration only. Present in manual and auto-shift mode under moderate acceleration.

Any ideas for a resolution?

Is the vehicle considered safe until resolved? (stupid question, but I need to ask).

Many thanks

Link to comment
Share on other sites

Where abouts on the vehicle do you hear the clunk? If it's from the middle of the vehicle I would start by inspecting the driveshaft centre brng.

Middle of the vehicle - the first time I heard this, I thought I'd left the transmission on the road somewhere behind me!

It has been suggested that (an interim fix) is to replace the valve (something-or-others) in the transmission - however, due to likely waring on the transmission gears, it would only be a matter of time before a complete transmission would be required.

Thoughts?

Link to comment
Share on other sites

The most common cause of that is a failing valve body in your transmission. Your description matches the symptoms to the "T." Its turned into a fairly common issue with the 04 - 05 Cayennes. I would not say that replacing the valve body is an "interim fix." If you get the valve body replaced your transmission should last indefinitely. I've seen a lot of Cayennes get valve bodies replaced and never have transmission problems again.

I'm curious, who gave you this advice?

  • Upvote 1
Link to comment
Share on other sites

The most common cause of that is a failing valve body in your transmission. Your description matches the symptoms to the "T." Its turned into a fairly common issue with the 04 - 05 Cayennes. I would not say that replacing the valve body is an "interim fix." If you get the valve body replaced your transmission should last indefinitely. I've seen a lot of Cayennes get valve bodies replaced and never have transmission problems again.

I'm curious, who gave you this advice?

Link to comment
Share on other sites

  • 1 month later...

Thanks for this one.. i was just about to describe the exact same situation...

I just bought a 2004 Cayenne Turbo used here in Poland, and having a very "hard clunk" as described during some hard shifting. First time it happened I got scared to death that something failed ;) I am not having it during downshifts, only hard upshifts.

Now will be off to the local Porsche center to have them check the valve body in the transmission. :)

Link to comment
Share on other sites

Thanks for this one.. i was just about to describe the exact same situation...

I just bought a 2004 Cayenne Turbo used here in Poland, and having a very "hard clunk" as described during some hard shifting. First time it happened I got scared to death that something failed ;) I am not having it during downshifts, only hard upshifts.

Now will be off to the local Porsche center to have them check the valve body in the transmission. :)

Don't be surprised if it's over a USD$2,400 repair. It did fix the problem, and now my Cayenne is amazing!

Link to comment
Share on other sites

I believe I had the same problem. Mine is an 04 Cayenne S with 74K miles. It happened every morning when the vehicle is cold. When I stepped on the accelerator, the car won't move until after a second or two then the gear caught on created a big jerk or "hard clunk". It got a little better when the car is hot. I brought it to the dealer, at first they replace the transmission control module, (while the car still in the dealer) it didn't fix it. Then they said it's the gear sensor (or somewhere in that area) was bad and can't be replaced. I ended up replaced the entire transmission!

...... now the Cayenne is in the shop for the power steering replacement!!!!! it's a lemon!

Link to comment
Share on other sites

  • 10 months later...
  • 5 weeks later...

Just wanted to update that I finally managed to convince myself of putting the Cayenne to Porsche Warsaw for further checking and they took a couple of small checks on it and just ordered a new valve body. Its been 3 weeks now, and it all seems to be working fine. Total cost including labor was something in the area of 3000 EUR including VAT.

Link to comment
Share on other sites

For anyone in N. America having this problem I have heard good things about the modified valve bodies from Sonnax

http://www.makcotransmissionparts.com/P15740-1.html

I'm not sure if Porsche's valve bodies are the same problematic ones or modified by Aisin, the transmission manufacturer.

But at under $1000 for the modified/improved valve body if you are a decent mechanic you can do the job yourself as the transmission doesn't need to be pulled to do it. You just need to pull the pan and keep it all very clean.

Edited by hahnmgh63
Link to comment
Share on other sites

  • 2 years later...
  • 6 years later...

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.