Quote:
Joe Weinstein said:
Hi folks. Is there any Porsche info on how closely the front and
rear tire diameters have to match in order to prevent damage to
the viscous torque transfer unit? It seems that the published specs
of the officially approved tires are not exactly the same. I want this
info for considering what range to stay within if I were to run
other tires and sizes if I were to change wheels etc.
thanks,
Joe



To my knowledge, more than 5% are "deadly" for the viscous coupling and less than 3% are recommended. But don't nail me on this one.