Hey guys...so just 6 month after i got my B5 S4...theres a weird whirring noise coming from the rear of the car. it sounds almost like a faint helicopter sound. my guesses are its either the tires(but they seem to be in good shape), lsd, or bearings. it only makes the noise while i am driving/in motion....doesnt happen if my cars on and i rev it in neutral. no cel light and no other warning lights are on. i do have the CPO warranty...but i wanted to get some ideas from you guys before i go. thanks for the help!

 

it could be ur tranny synchros but i would say use the warranty u paid for an dbring it in. U should get a free rental.