I think i might have a little bit of an idea what it is. anyways. is straight drive. 5 speed. and when ive been drivin for about 5 minutes or so, when i put it in 1st or second and just drive real slow there is this whistling noise coming from the transmission. But when i push the clutch in it cuts right out and stops. im thinking it might be the pilot bushing? any idea's?

 

sorry, i mean throw out berring instead of pilot berring. i was in a different thought when i was typing.