Jump to content

The RennTech.org community is Member supported!  Please consider an ANNUAL donation to help keep this site operating.
Click here to Donate

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)

Recommended Posts

Went to the garage, started my car, pulled out of the garage, braked to stop to check that my garage door closed (5 sec max), applied some gas and nothing happened. When I tried to change the gear selection, the gear indicator in the tachometer didn't show at all.  Pushed it back into the driveway as best I could. I have tried it several times with no luck. No fault lights have come on!!  I looked here in the forum but didn't see any postings that were similar.  Five days previous to this event, I returned from a spirited, three state sampling (1900mi) of the twistys and mountain roads, only smiles as a result.  Anyone have any thoughts?

 

Edited by Loren
Removed "SHOUTING" from title
Link to post
Share on other sites
    You can remove these ads by becoming a Contributing Member.

Do you have a durametric you can use to pull some codes? I believe the PDK will flash something in the gear indicator if it is in limp home mode but this may be more subtle than that.


Sent from my iPhone using Tapatalk

Link to post
Share on other sites
  • Moderators
7 hours ago, JCyoda said:

Yes, I have a "FIXD" device that reads the codes, and told me that there were no error codes!!🙁 Maybe I will go check again.  Thanks for the note.

 

Many OBD II scanners do not successfully read Porsche codes, particularly for something like the PDK.  You need a Porsche specific tool (Durametric, PIWIS).

Link to post
Share on other sites
  • 2 weeks later...

Well, I have the diagonsis now and the result is grim!  After multiple attempts to reset the PDK brain, the conclusion is that i need another (new) transmission to the tune of about $25K for R&R and new transmission.    This a know problem tho' rare. Remindes one of something called "IMS"! Eh?

I am getting a second opinion, but I think I am screwed.  If I sell it as is, it's a big lose and I still need a "new" car, or if I fix it the bottom line on my investment goes up by 25K but I still have my Porsche..... I guess it is a no-brainer.  😒

Link to post
Share on other sites
  • Moderators
40 minutes ago, JCyoda said:

Well, I have the diagonsis now and the result is grim!  After multiple attempts to reset the PDK brain, the conclusion is that i need another (new) transmission to the tune of about $25K for R&R and new transmission.    This a know problem tho' rare. Remindes one of something called " IMS"! Eh?

I am getting a second opinion, but I think I am screwed.  If I sell it as is, it's a big lose and I still need a "new" car, or if I fix it the bottom line on my investment goes up by 25K but I still have my Porsche..... I guess it is a no-brainer.  😒

 

Sorry to hear of your predicament.  The PDK is ultra complex internally, with even the dealer techs limited to what they can do to repair them.  These internals require very specialized fixtures and tooling, which is beyond even the dealer’s capabilities.  Good luck with your next steps.......

Link to post
Share on other sites
  • 1 year later...

I was surprised to read that the solution to a control problem is replacing the entire gearbox - this seems (in the absence of any other information) to be excessive. Rennlist has a good sticky on repairing PDKs.  In any case Porsche needs to introduce some exchange program so that the value in the "broken" gearbox is returned to the customer. In this case, for instance, I speculate that the mechanical components, clutches etc are entirely serviceable. The current arrangement makes the customers with the first-generation PDK boxes the gamma-testers of a new device. It would be interesting to PDK compare failure rates in the 997 with the later 991s and 992s.

Link to post
Share on other sites
  • Moderators

Welcome to RennTech :welcomeani:

As noted above, Porsche, like may other OEM's, has restricted what repairs are permitted in the field with their SMG (read PDK) transmissions.  Dealer techs are limited to a very short list of things to check, including software updates, before they resort to replacing the gearbox.  And, like other brands, there is no plans for an exchange program where the vehicle owner gets anything more than a core value for the used gearbox because it would be impractical for Porsche or any other OEM to tear down and access the level damage to the components in a timely manner, so a value retention program is little more than wishful thinking.  Porsche, again like other brands, has also dramatically restricted the availability of parts for these transmissions, partially because aftermarket vendors were purchasing them and then significantly modifying them before selling them to the public.  The wet clutch assembly is a good example; Porsche had made it available as an over the counter part number for around $5K (US), but stopped doing so when cars came in with the modified clutches failing and damaging other component's in the gearboxes. Net result is that you can now only find sump pans, filters, and fluids for these gearboxes; anything beyond that gets very expensive very quickly.

Link to post
Share on other sites

This is even the case with pre-PDK gearboxes like the Getrag manual gearbox for my 996TT that was damaged due to the previous owner using non-OE fluid (HUGE no-no).  Take that TT to a Porsche dealer and the only answer you're going to get is buy a new gearbox.  Fortunately for the pre-PDK gearboxes they can be repaired -- but there is only one shop in the entire USA that is a lock for this extremely specialized job and it ain't cheap.  But a new PDK gearbox is like $15-20K last I checked so......... (edit: the poster above says $25K, even worse)

Edited by Silver_TT
Link to post
Share on other sites

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.

  • Similar Content

    • By wupe
      I bought a used 2009 c2s pdk with 17K miles on it. The car drives beautifully,  except in the m-mode, when I shift from the 1st to 2nd gear, the rpm would go up to 4K before the 2nd gear is engaged. I am used to(2003 tiptronic)  change gear around 2500~3k rpm, but this c2s seems like having a mind of its own and takes the rpm to 4k every time. This only happens from 1st to 2nd, all other gears are fine.  Is this normal? Should I have any concern over this? Thanks in advance!
×
×
  • 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.