'88 80Q help solving accident-related issues

[Tessie McMillan]

I think my question may have gotten lost between the lines of the "how 
did the thief get the key to our car????" problem, so I'm reposting. 
Please, I track my AudiDudie and she's my daily driver, so I want to 
ensure these are not safety issues and am looking for your help.

After an excursion I had at the track that dumped the right front of my 
80Q into a ditch and sent me rear-ward smack into a hill, we've repaired 
everything we could _see_ to be broken. New right front suspension 
(wheel, wheel hub, wheel bearing, A-arm); rebuilt front bumper assembly. 
The frame may have bent; the hood aligns a little differently now. 
According to my mechanic, all 4 coilovers (they were new then) and mounts 
survived in good shape.

After the initial repairs, odd noises during driving or braking led 
us to start fixing more things: we replaced both rear wheel bearings as 
they must have gotten crunched, and both front rotors, since the right 
was warped and scarred. In addition, we we chamfered the edges 
of the front brake pads, but we re-used the old brake pads.

I now have new noises which were not present before the accident, and 
these sound very suspicious to me. Everything has been taken apart and put 
back together so many times that I'm really puzzled about this and don't 
know where to start looking. 

	1) I hear a staccato, very high pitched squeaking at the rear 
wheels, most of the time when driving in a straight line.
	I hear squeaking of the front wheels only intermittnetly when 
driving. I noticed this particularly on a gravel/potholey road and when I 
make the corner into my driveway. What up with that?

	2) When I brake, 2 ka-klinks come from the front brakes; first 
the left brake, then the right brake when I come to a stop. I have 
basically a stock setup: Girling calipers, PowerDisc rotors, and 
performance pads. Can this be shims? What do shims do, and does it matter 
how many there are?
 
	3) I hear a hollow THUNK sound somewhere in the front suspension 
near to the ground when I'm making a turn or going over something 
off-camber. Is this important? Could it be a suspension piece and where 
would you look first? 

I'd really appreciate any suggestions as to what these noises might 
represent, so I can fix if necessary.

Tess
in Bellevue, WA USA