wildsurfer92

okay so i had a whining from my rear end, and me and my boss put it up on a lift and i put it in 4th and drove it to 75 mph, and that car was shaking soo bad, so my boss says the driveshaft is out of balance...so i take it home and put it up on ramps, and pull the driveshaft, and i go and get it balanced, so of course they said it wasnt too off, but i should get new u-joints, so i put some new u-joints in, and i havent driven the car for like two weeks, until yesterday when I drove down to ocean city...so on the way here, i was up around 70-75, and it goes good, until i get off the throttle and then it shakes...not really bad but i got the shakes...do i need to go rebalance the shaft? or do i have other problems? and what could my whine be from? gears?

Jfsram

A driveshaft will not know the difference (concerning vibration) whether accelerating or decellerating.

Check the rear suspension bushings. Your tail shaft bushings, pinion bearing, rear flange bolts. The pinion angle may be changing when you are decellerating.

mjr46

did you recently have gears put in the rear?? if not could be a bad pinion bearing or carrier bearings....my 92 was whining and the carrier bearings were all pitted....replaced and noise was gone...as far as the vibration goes I would start with the tires and put them on a spin balancer and look while it's spinning to see if the rim or any one tire has a excessive wobble...could be either or

wildsurfer92

i see..hmm im prolly gunna take it in next week to get looked at...the tires are all new, and i balanced them all myself fairly recently so i dont think its them, but im pretty sure the whine is from the gears...has anyone heard of richmond gears whining? ive been told to go with frpp gears, so i may do that down the road

PJB

My car had a driveline shake when letting off the gas and it was the throttle cable being out of adjustment.
My car has an AOD though.

Tony71502

Ur gonna replace ur gears because they arent the right company. Call me crazy but I thought the whine in the gears is from how they are aligned or what material they are made of.

wildsurfer92

well i have no idea, i have been told that richmond arent the best, and i guess they werent put in or shimmed properly, so i will replace them eventually and have been told frpp is the way to go

wildsurfer92

okay so i went and just clocked the shaft and its still shaking but now it does it at 80 and over, so i think it needs a rebalance...or should i get an aluminum ?

mattdel

its not the driveshaft.

93 LX FiveO

jack up the rear

push up on the driveshaft where it meets the rearend

if theres some play there u prob need new pinion seal