My audi has been doing this humming noise when i accelerate, it's automatic. on 2005 Audi A4

I jumped my friends car when i first got it, which now i know was really bad for my type of car. It's been doing this for about 3 months now.

by in Escondido, CA on March 08, 2012
1 answer
ANSWER by , March 08, 2012
POSSIBLE ALT ISSUE OR PULLEY BEARING