ok guys i this might be nothing...... I have an 04 nissan 350z AT with 89900 miles on it so early today I was leaving work i put the car in netural and i heard a werid nosie it kind of sounded like the belt was slipping but alot louder... but when i put the car in drive the nosie went away, but the ac wasnt working or blow any air....after shifting the the car alil bit the noise was gone and the ac was working .....i was thinking one of my pulleys might be going out but not sure ????....any advice would help...thanks....

 

bump

 

I have the same problem..except the noise isnt always there...but when it does come, it is usually on cold start up...after when i'm in drive for awhile it goes away...I think its the belt...i've checked today and there are some breaks in them...time to change.

 

Most likely needs belt replacement.