Jump to content

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)

Very Harsh Down Shift - 6th to 4th...


Recommended Posts

Hi all, need some advice...

Just bought a MY05 Cayenne Turbo and while crusing on the Motorway at 70 mph, if I put my foot down on the gas pedal it shifts down to 5th / 4th to accelerate - all good except that the downshift to 4th shudders the whole car and sounds horrendous. Is this just the car not being use to my driving style or is it something more serious...?

Also while going around town at 30mph, the down shift from 5th to 4th can be a little notchy as well, not sure if this is related or not.

Any advice greatfully received!

Link to comment
Share on other sites

How many miles on it...could be a bad front motor mount. I understand they go bad around 40000 miles.

Hi all, need some advice...

Just bought a MY05 Cayenne Turbo and while crusing on the Motorway at 70 mph, if I put my foot down on the gas pedal it shifts down to 5th / 4th to accelerate - all good except that the downshift to 4th shudders the whole car and sounds horrendous. Is this just the car not being use to my driving style or is it something more serious...?

Also while going around town at 30mph, the down shift from 5th to 4th can be a little notchy as well, not sure if this is related or not.

Any advice greatfully received!

Link to comment
Share on other sites

Yep, had the exact same symptom on my 2004 CTT.... was a bad transmission valve body. The dealer also replaced the control unit for the transmission since there was an updated version. Runs about $2000 installed.

David

Link to comment
Share on other sites

Yep, had the exact same symptom on my 2004 CTT.... was a bad transmission valve body. The dealer also replaced the control unit for the transmission since there was an updated version. Runs about $2000 installed.

David

Thanks all, it's back with the dealer now for repair. Will be interesting to see what they say is wrong! I'll mention the valve body when I call them on Tuesday.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • 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.