blabla on AWD

[isham-research.freeserve.co.uk at pop.pol.net.uk]

>         OK.....        I drive a 87 4k Q Sedan.  I had a blowout on the rear
> and when I put on the spare, it didn't drive right?!  Of course it is the
> Longitudinally mounted 2.2 five cyl.  The spare on the rear left and the
> front right were blistering hot when I stopped.  I couldn't go faster than
> 30kph for fear of destroying my drivetrain.  I beleive the problem was that
> the spare was a different size then the other tires and thus would turn at a
> different speed at the outer circumference.
>         Question:  What the F***!  Isn't there supposed to be someway the
> drivetrain should be able to compensate for having one tire that moves at a
> different speed than the others?  I can't see that after the thousands of KM
> one might put on a brand new set of tires, that they could possibly stay the
> same size all of the time.

Sounds like one or both of your differentials is locked without you
being aware of the fact.  Not unknown.

--
 Phil Payne
 http://www.isham-research.freeserve.co.uk/quattro
 Phone +44 7785 302803   Fax: +44 7785 309674