good vibrations......not!!!
 

my 69 chevy sometimes will vibrate at 445 or 50 and sometimes not until 65, how do i fix it, is it u-joints?? driveshaft?? i hav to go on the highway with this truck and i can't when its vibrating, and its not at high rpms when its vibrationg only like 2000

It depends on what type of vibaration u have.
Check out tires first, balance, out of round, ect. Then the front end or the drive line. Front end: bad ball joints, idle arm, pitman arm, shocks. Drive line: balance, out of time, u joints. it is possible the trany slipping can cause a vibaration. hope this helps

hey im only 16 so i don't understand most of that stuff u just said but im tryin to get into cars more so if u hav time to explain it that would b benificial if not thanx for tryin to help me

jordan, you have alot of spinning parts like the driveshaft,tires ect. they all have to be balenced or itll shake ,its like when a fan losses a blade and turns and vibrates

A good guess would be the midshaft bearing. I've seen several go out, but when you crawl under the truck, they still feel really solid. Just if you seperate the 2 driveshafts make sure that you mark them so they go back together the same, if you don't you'll have a major vibration and ruin your new midshaft bearing. I learned that one the hard way.

is this something that happened all of a sudden or has it been slowly getting worse...??? if all of a sudden, have you done anything recently that would cause the problem, like front suspension work, tire rotation, etc....????

when was the front suspension rebuilt last...??? Jack up a front tire, grab it at the 12 and 6 positions.... pull on the top and push at the bottom (and vice versa) to see if there's any looseness...

let us know what you find....

I just had a vibration problem like that too. I had to shim my tranny up 1/2 inch because of the drop kit setting my angles way off. The vibration ended up ruining my pinion bearing too, so get it fixed right away.

vibe help
 

mine was a u-joint problem chased it for a month then found a bad u-joint