funkadelic

i thought it was perhaps the engine mount, so i replaced w/an AMS Polymount. no dice. i also have a tranny stabilizer bar as well. this is different from the "thunk" that you get when shifting gears (this thunk happens while in the same gear).

for example:

you're accelerating brisky (not WOT) to get ahead of another car in the next lane over (eg. 60->75), and then lift to slow down because there is a car in front. then you get back on the accelerator to maintain the speed in the faster lane. when i get back on the accelerator, i get a noticable "thunk" from the car. could it be another engine mount? clutch? i'm especially interested if anyone's had the same problem and had the dealer rectify it.

i can always reproduce it doing a brisk acceleration followed by a lift of the gas pedal, and then accelerating again.

thanks in advance for any advice!

Thermal

I was told it was quattro differentials locking back for acceration... I get it all the time.

YS4

get rid of the dead body in the trunk..Mr. Walnuts..:-)

Jimmy Pribble

That means your brakes are your "diff locks". Do your brakes "thunk" any other time? Now, I'm not saying it couldn't be a normal sound, but I think it very unlikely. You might look around under there. Specifically, you might want to look at the rear diff mount, tranny mounts, heck, even motor mounts. It could be the exhaust hitting something, too.

My $.02,

Jimmy "two quattros with actual diff locks" Pribble

Jason@Trinity

that's the sub in the trunck falling over

YS4

The trunk-of-funk

Audiboy

as in some play. The slight but non frequent thug from coast to power was always normal in my book because of the torsen switching around

Singletrack

Yeah, I've never heard that in my car or my friend's S4.

donp

<center><img src="http://pictureposter.audiworld.com/12322/rdiff.jpg"></center><p>

ConeKiller

Sounds like subframe bushings. Mine were torn with 18k on the odo