Re: rear end, manifold, and engine

[Theo Smit <tsmit@shaw.ca>]

 From your description it sounds like a rear wheel bearing. Does it go 
away or change when you put load on it? Of course it might be hard to 
hear over the exhaust note... but if it changes with load then it'd be 
more indicative of driveshaft of maybe pinion bearing problems.

Good luck,
Theo