this is a bad month...

[Blue_S4]

ok, so after fixing a bad ICM, i have a funny vibration...

it vibrates only from about 15-40 (no matter how hard the acceleration) then goes away. it only vibrates when the gas is pressed, either accelerating, or cruising speed, and goes away completely when i let off the gas. it doesnt matter what gear its in, happens in all gears.

from searching i found:

center support bearing-- but it doesnt make any rattles or humming, plus vibration only when gased.
CV-- look fine upon inspection, and no clunks when turning, or anything.
bad motor/trans mounts-- probably, but only cause vibration at low speeds?
bad driveshaft-- its smooth at 45 mph all the way to 120.
boost leak-- would this cause a vibration only at low speeds or anytime i go to accelerate? VAG-Com shows no misfires however.

could it be anything else? input appreciated. its hard to diagnose it right now seeings it about 12 degrees every freaking day outside and i freeze my arse off laying on the ground, so im trying to eliminate as much as possible while staying warm.

so confused, help much appreciated.

[xmoox]

when it vibrates whats the engine rpm or is it just based on speed of the car. It could be something with your transmission im thinking your torque converter or your timing is off a little. Is the vibration the same intensity as you approach 40?

[Blue_S4]

the vibration varies with speed, not engine RPM. it starts to go away as i approach 40.