1990 Audi 200 TQ. I have a noise coming from the right rearend that sounds kind of like a helicopter. The problem only shown up once the car is warm and only while accelerating, it does not make the noise when off the gas. It almost seems like I can slightly feel it also, again only while accelerating.

 

does it feel like its dragging? Sounds almost like a brake caliper. possibly a CV axel.

 

It does not feel like its dragging, but i know for a fact that i need to replace my brake caliper because its seized up a bit and making the wheel very hot. I already ordered the caliper. Unfortunately i don't think the caliper is the source since i only hear it when its warm and when i am on the gas, it never seems to occur unless i touch the gas. A cv axle may be the culprit, i have heard wheel bearing also, but i assume i would hear it most of the time if it were a bearing same as if were the caliper, correct? I guess i will start with the caliper and see what happens.