I recently installed LC coils and longer shocks I picked up from wheelersoffroad and now when I drive, I hear a grinding howling noise whenever I drive faster than 30-40. The noise only occurs when I release the gas. Ive heard it could be the pinion bearings and Ive searched it until my head hurts. Ive had a friend check it out and he thinks its the wheel bearings which I dont think it is. The noise seems to come from the front underneath the car but it could be from the back. I dont want to waste money on things that arent the problem, any ideas?