1989 S4 Auto Transmission Problems
03-30-2013, 10:30 PM
#16
Cruisin'
Join Date: Dec 2012
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TT annoying whine
Why a swap? Did you considering a rebuild instead using new upgraded bearings.
(good find on the donor car, though)
One of us hobbyists would have rebuilt the tube using the new Constantine bearings, else bought a rebuilt tube from 928 International. Not used a donor tube as-is.
But it might not be the problem at all. Several of us have had whining from auto trans units, bearings or primary pump have been implicated. Curious how yours developed and how you decided on the torque tube being the issue. Try some searching here.
What is the crank endplay on your car? Mechanic should have measured that also and explained to you how he would take precautions to ensure that after the tube swap the engine wouldn't be in jeopardy of thrust bearing failure. Probably not core to the whine sound, but now more than ever you need to learn about this situation that affects S4 cars. There are a couple of auxilliary clamps that can be used to inexpensively help protect the car.
Where are you located? You might be near a good support group of 928 rennlist guys.
(good find on the donor car, though)
One of us hobbyists would have rebuilt the tube using the new Constantine bearings, else bought a rebuilt tube from 928 International. Not used a donor tube as-is.
But it might not be the problem at all. Several of us have had whining from auto trans units, bearings or primary pump have been implicated. Curious how yours developed and how you decided on the torque tube being the issue. Try some searching here.
What is the crank endplay on your car? Mechanic should have measured that also and explained to you how he would take precautions to ensure that after the tube swap the engine wouldn't be in jeopardy of thrust bearing failure. Probably not core to the whine sound, but now more than ever you need to learn about this situation that affects S4 cars. There are a couple of auxilliary clamps that can be used to inexpensively help protect the car.
Where are you located? You might be near a good support group of 928 rennlist guys.
03-30-2013, 10:55 PM
#17
Nordschleife Master
This from the FAQ thread at the top of the Forum page.
https://rennlist.com/forums/3480841-post37.html
You can find even more using Search function.
https://rennlist.com/forums/3480841-post37.html
You can find even more using Search function.
