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Are torque tube failures common in 5 speed manual transmission cars?

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Old 11-12-2014 | 10:02 PM
  #16  
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Originally Posted by daveo90s4
No. Not 'forward migration of the diveshaft'. It is .... Because of the rearward migration of the front of the driveshaft out of the flex plate, thus increasing the overall length of the driveshaft assembly (shaft plus flex plate) which pushes... Etc etc
No Dave. It's the loosening of the rear pinch bolt.
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Old 11-13-2014 | 06:31 AM
  #17  
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Originally Posted by UpFixenDerPorsche
No Dave. It's the loosening of the rear pinch bolt.
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Nope John.

If that were the case there would be no relative movement between the front splines on the shaft and the front flex plate. But there is inevitably this relative movement. Particularly when the rear bolt is both tight and in its correct groove.

And nope again, I've checked my rear bolt and position, replaced with new, and all good.

And nope again (again) 'cos my flex plate is dead straight 'cos I replaced my 28 mm 'necked' shaft with a 25mm non-necked circlip-equipped shaft and set the rear preload properly.

Think I'm ok😃

Cheers

Dave
Old 11-13-2014 | 06:58 AM
  #18  
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Originally Posted by daveo90s4
Nope John.

If that were the case there would be no relative movement between the front splines on the shaft and the front flex plate. But there is inevitably this relative movement. Particularly when the rear bolt is both tight and in its correct groove.

And nope again, I've checked my rear bolt and position, replaced with new, and all good.

And nope again (again) 'cos my flex plate is dead straight 'cos I replaced my 28 mm 'necked' shaft with a 25mm non-necked circlip-equipped shaft and set the rear preload properly.

Think I'm ok😃

Cheers

Dave




Hello Dave. Who is "John"?
Old 11-13-2014 | 03:46 PM
  #19  
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In theory its possible to have thrust bearing failure also in manual gearbox car. It probably takes million miles of city driving with constant clutch use. When clutch is used it puts pressure to thrust bearing similarly as automatic. Porsche changed bearing to taller sided version in '83 MY (IIRR) because of this. If '85+ cars had used early low sided bearing there would be much more TBF cases on much smaller mileage.



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