alright people i have a 96 A4 Z28, and when im just rolling at idle (in drive, no brakes or gas) i can hear and feel the rear end clunking, it sounds pretty horrible
i remember my 90 mustang gt did the exact same thing, but did it even worse ( every time it would clunk the car would shake side to side, felt like it would fall apart at any moment)
just wondering if the diff. is toast, or what
i can take the cover off tomorrow and take some pics if you think that would help

 

Have you climbed under the car and checked the obvious things.

Transmission bushing, torque arm bolts, sway bar ends, etc.

I'd rule out all of those via visual inspection, unless you *know* the noise is coming from inside the diff.

If so, pull the cover and inspect.

 

Mine is doin the same. Gettin rebuilt this Friday. I'm pretty sure its either the gears or posi, maybe both. Whatever it is it aint gonna be good.

 

i wouldnt know what to look for and my haynes manual is way too vague, it assumes you know verything about cars

 

If you have aftermarket control arms check those first....My BMR's used to clunk because they come loose while driving....anybody and everybody will tell you aftermarket tubular arms will make some noise and need tighting here and there...good luck

 

Well here is pics of what caused my clunk. Just got the car back yesterday. Shattered my posi. The marks you see on the side are from the pinion gear diggin into the posi.

 

If you know what a sway bar, lower control arms, and a torque arm look like, just check all the nuts, bolts and bushings on the ends of them.

If you have anything loose, or torn bushings tighten them up, and replace the bushings.

That's the first thing to check.

If you don't know what lower control arms, a torque arm, or sway bars look like then you can search on the net, and get someone who knows their way around cars to inspect those things first.

If you were referring ot not knowing what the inside of the diff looks like, the pictures above are a good shot of what you don't want to see.

Also searching ont he net for ring and pinion gears, and posi units should show you some images.

If you click on the "2000 TA" link under my banner I have pictures of ring gears, pinion gears, lower control arms, torque arm, etc. (http://www.texasfbody.org/forums/gar...e=vehicle&id=1)

 

thanks for the help, ill se what i can find my next day off

 

whats a cluck from the rear end?

you got a chicken in the posi or what?

 

yeah, and now i have a damn moo coming from the engine, im pissed

 

its the optispark if you have an LT1... they make that noise