E30 Zone

hi zoners. As i go up in the revs in mostly 1st and 2nd gear, theres a "wooooohing" noise comming i THINK from the propshaft, people sitting in the back cannot hear it and its not from the engine. it gets louder as the revs go up and it doesnt happen all the time, just randomly. i changed thee diff a few months back and i think its been happening since then. (325i)

I have a wooooohing noise, it comes from my viscous fan.

I'd have thought if there was a problem with your prop it'd be very noticeable

lol ok cheers, does yours only happen randomly aswel? and gets louder with revs?