84conversion50

balancer spins good. what about tailshaft?

mjr46

see how much run out is in it, grab it and see how much up and down or side to side play there is.

84conversion50

theres not much but you can move it a little.

mjr46

most likely not the prob then, make sure all the u-joints are tight too

84conversion50

that may be where the looseness is. could it be a wheel bearing?

calfroper_06

seeing that its an rpm dependent vibration then no its no a wheel bearing. Have you check your timing lately, maybe your balancers old and spun on you???

84conversion50

well the mounts look good and timing is correct but when i put it in reverse and give it alot of gas the shifter kicks sideways and you hear a clunk. so im leaning towards a mount.

mjr46

check the trans and motor mounts

84conversion50

yes sir.

84conversion50

UPDATE: vibration i believe is a motormount causing the exhaust to rattle around since its already touching the top of the fenderwell.

but the whining starts at 60 and gets louder the faster i go. it seems to change tones when i move the steering wheel slightly.