[Biturbos4] A whine from the rear
chris at newbold.org
Thu Jul 13 07:57:59 EDT 2006
No, no, not from my son in the back seat :)
Just shy of 65k miles, and I'm starting to notice a whine originating
somewhere in the rear. The whine...
o is loudest between 65-70MPH
o is unaffected by gear: 3rd, 4th, 5th or 6th and the pitch is identical
o is unaffected by steering inputs
o is strongly correlated to throttle inputs:
- it stops if you gently lift and coast
- it stops if you dip in and accelerate
- it returns in steady cruise
The only things which satisfy all of these observations are:
o rear differential
o center drive shaft bearing (do the B5s even have these?)
I haven't heard of any premature differential failures in the B5 S4, and
it's not like it's very highly stressed (compared to some other
comonents). But, hey, there's always a first time.
Anyone have any thoughts or comments?
Keman, I don't know if you're still around, but did you see any such
failures during your time in the shop?
2001.5 S4 Avant 6spd
More information about the Biturbos4