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Mark A Taylor

Transmission problems

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Gday .. I have a 2004 Porsche Boxster 986S and am having Transmission problems  ..  When im driving down the highway the transmission fluctuates between 4th and 5th gears  .. A mechanic

said that it is the Transmission Control Unit .. but another said that was unlikely  ..  anybody have any ideas  ???  Thanks Marcus

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Tiptronic??? I presume?

 

How many years and kilometers on the fluid? Has the fluid "ever" been changed?

 

When you are stopped, in manual mode, if you change from 2nd to 1st does the trans shift "bang" hard into 1st? or really smooth?

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I purchased the vehicle 2nd hand and do not know if the fluid has ever been changed  ..  I have not driven the vehicle yet ( Im in a wheelchair and as yet have not fitted a set of

hand controls ) ..  my mate drove it home and he said that it was  fluctuating between 4th and 5th  but other than that it drove very smoothly .. and he did not drive it manually

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The Tiptronic, while driving in 5th, can shift to 4th in an instant with a little bit of throttle. If there was no change in throttle and driving on level road then yes, there's a problem. At a low enough speed, but just enough to be in 5th, any tiny increase in throttle will result in a downshift.

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12 hours ago, Mark A Taylor said:

I have not driven the vehicle yet ( Im in a wheelchair and as yet have not fitted a set of

hand controls ) ..  

Off topic, and speaking of hand controls, it was very impressive to watch Alex Zanardi drive in the Rolex 24 last weekend. Amazing!

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Gday  ..  I have seen Alex Zanardi and think he is terrific but I saw a photo of him a while ago and he had a motorised wheel attached to the front of his wheelchair  ..  I dont know what to make of it so I dont judge  ..  that is to say its something I would never do as I have to good arms which allow me to push and control the chair any thing less is laziness  ...   Im thinking about what you said ..  maybe  ..  Lack of Fluid  ..  Kickdown adjustment or associated  ..  Or  TCU ?????? i shall continue to investigate  Thanks Marcus

Edited by Mark A Taylor

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