Vibration noise in my 80 Series HELP!!!

Gidday,You have answered your own question.I had the same problem in a 4 Runner i had.It had been lifted and the diff angle was the culprit.When the diff and the gearbox are out of alignment(too great an angle) the tailshaft sets up a vibration.I had to fit wedges to the rear axle to fix the problem.Also check the alignment of the uni joints(very easlie overlooked)even if they had been replaced.Chec all your engine and b/box mounts these can also cause vibrations in the drive line.
If some one has greased the front spline on the d/shaft excessivly this can also cause a vibration in the line.
I also now have a 80 series that has been lifted and suffer the same vibe at 103 ks and some day will fix it.
Hope this helps,
Seeya Locallaw

Gidday,There are no specs for d/shaft angles on a truck that has been lifted.As for binding they dont bind but are out of alignment.The tailshaft sets up awobble.It is hard to try and explain what happens when they are out over the net.The vibe you are feeling comes thru the floor under your feet and thru your seat is that correct and no vibes in the s/wheel.Have you had the d/shaft balanced.Do you have a load in the rear which increases the front d/shaft angle therefore causing a vibe.
Mine has been lifted 50 mm Do a search thru the archives under driveshaft vibrations and see what pops up.
Try and see,
Seeya Locallaw

Gidday again,Which now points to tailshaft wobble and tailshaft alignment.
Seeya Locallaw

Mate dont stress . ill tell you exactly what it is . When your mechanic fitted your springs , he let the front tail shaft hit the swaybar , it has a minor didnt and is out of ballance , Ballance the front tail shaft and problem will go away

cheers

Is it a noise ,vibration or steering wheel wobble ?
Try getting the standard springs put back in, only takes half an hour and if it goes away.it is more than likley the tail shaft angle other wise it is the caster angle and your are getting the vibration the same as shopping trolley caster wheels do.
Pedro

Warwick , were do you live . If you are in Melbourne , I would be more than happy to have a look . I would like to have a drive to see what noise you have . I have a 5" lifter cruiser with ni vibration what so ever . My drive angles are spot on , so i dont see it been anything like this . Unless your castor kit is fitted wrong , and its up SH*T creek. Have you had a wheel alighment ? what was the reading ? caster that is. where the CV's go into the hub, is the brass bush ok ? is will make the CV's flop around .

Ok read through the posts and you have put a 50mm lift in the bus but not had a caster correction yet. +1 is about right for this lift...you should have noticed the steering is very twitchy/sensitive, but not too bad. You should also not have any vibrations, but this is not the case. Swapping driveshafts does no good, it is therefore something to do with your setup or mechanical state of components. Taking out your front shaft stops the vibrations aswell so it is something to do with the angle of the dangle....i have heard many people complain about this vibration before, so you are in good company.
The easiest way to correct the caster back to spec of -1 degree would be 2 degree caster bushes, however, i would suggest you look up the lcool website on www.lcool.org for other ways to do this, keeping your rubber bushes that flex better in the bush, and dont crack the diff housings or prematurely wear out.
Doing this (changing caster) may stop the vibrations....putting spacers under the crossmember may stop the vibrations...they are from 2 unis running at different angles...their vibs are not being cancelled out by eachother as is the usual scenario.
If all else fails, put some spacers ontop of the springs :-)
Andrew

Gidday,I rest my case.
Seeya Locallaw