Diff/Tranny oil o.e.m. synthetic on a V8?!?

[Bryan Kamerer <kamerer@madriver.com>]

	My mechanic tells me my diff/tranny and rear diff. fluids are synthetic
and no maintenance (other than checking level) for lifetime.  I acept this
if indeed this is true, but did not know that Audi put synthetic oils in
those applications.  Car is V8, 1991, 5 speed so he says tranny and center
diff all one unit.

	He is a great mechanic, audi specialist, and audi rally racer.  I don't
doubt his knowledge, but I just wanted to fly this by the list as I am
crazy about maintenance on this car so as to get a long life out of it.

	Thanks for any thoughts,

	Bryan Kamerer