View Full Version : shims which way?
la mula pescadora
03-11-2002, 02:39 AM
i just bought a pair of shims now the question is in which way do they go i place them with the thick part to the back of diff where the cover goes and the thin pointing to the shaft and flat part down
porkchop
03-11-2002, 03:04 AM
Generally the fat part goes to the front. You want to have the same angle from the t-case at the diff.
River Beast
03-11-2002, 03:15 AM
What Bryant said is true for the SOA setups....thick part of shim to the front on front axle and to the rear on rear axle.
For the SUA the shims are opposite....
la mula pescadora
03-11-2002, 03:20 AM
so thick par goes to wer the shaft is
River Beast
03-11-2002, 04:19 AM
Depends on SUA or SOA...
la mula pescadora
03-11-2002, 04:33 AM
have soa
River Beast
03-11-2002, 05:19 AM
Thick part AWAY from the pinion....
porkchop
03-11-2002, 05:47 AM
On the rear axle the fat part needs to go towards the front. This way it will point the pinion down so the angle will match the angle coming out of the t-case. What happened to that diagram that shows the proper angle set up? I could not find it.
bchesley
03-11-2002, 05:47 AM
Go to hardware store and pick up an angle finder. You want your pinion To be within 1 degree down from the corresponding yoke on the transfer case rear output. The front the shaft should be parallel with the yoke on the pinion. This should stop vibrations and binding.
la mula pescadora
03-11-2002, 05:49 AM
thick part away from pinion mining if its for front dif the shims thick part will be to the front of jeep
porkchop
03-11-2002, 07:02 AM
The thick part goes forward on both the front and the rear.
I hate to make this more complicated than it needs to be.. but , let me get this straight.. the thick part goes to the middle of the vehicle on both front and back , Unless... the front has a soa.. and in that case the thick goes towards the front.. correct or not ?
porkchop
03-11-2002, 11:41 AM
Yes, That is correct. That is the way mine are. I don't have any front shims since I made the adjustments before I welded the new perches on.
kewl.. Thats how I did mine but the posts above had me a little concerned.. also.. my front only had one shim.. (passenger side opposite of the diffrential house) if Im not mistaken it came like this from factory, could this be incorrect ?..
porkchop
03-11-2002, 11:56 AM
That am not sure about. Mine had a plate to compensate foe the extra thickness of the diff. The steering dampner also connects to it. Is this the same thing?
No , as a matter of fact it is inbetween that plate you mentioned and my leaf pack.. Im kinda wondering now if I have it in wrong location.
redneckd out
03-11-2002, 12:17 PM
You'd know right away if you had it in backwards, because the rig will vibrate your teeth loose! We did a 3" Rough Country kit, and their instructions were backwards! The bottom line, is that you put in the shims whichever way is necessary to point the yoke from the pumpkin up towards the t-case---the straighter the line, the less the chance for vibration.
CR
Blake you are correct.. The instructions were wrong on mine also.. I had to remove both rear leafs just to turn them around.. pretty frustrating..
porkchop
03-11-2002, 03:15 PM
<blockquote>quote:</font><hr>Originally posted by BlakeAtlanta:
The bottom line, is that you put in the shims whichever way is necessary to point the yoke from the pumpkin up towards the t-case---the straighter the line, the less the chance for vibration.
CR<hr></blockquote>
That is not the case. You need to have the same angle from the t-case as you do from the axle. My axle pinion is almost level and then the driveshaft points straight up. It looks like a lazy "v" If it was any other way I would not be able to move due to too many vibs.
oldyellowwagoneer
03-11-2002, 04:13 PM
Ok, heres the way it works: 1) If you have a cv type driveshaft you want the non cv yoke pointing directly towards the other yoke with no angle. 2) If you have a single u-joint on both ends you want the yokes to have the same angle +/- 2 degrees. 3) Those rules don't always work :D Because each jeep may be built different from one owner to another you have to look at each one as a uniquely different example. A sky high jeep has certain problems. When it is lifted high the driveline angle may be too extreme to keep u-joints in it. Therefore the pinion needs to be tipped up to make it work. Unless you have the money to cut and angle the front diff upwards towards the transfer case you run a cv shaft at an angle. Try to stick to rules one and two but dont worry if rule three applies. DENNIS
[ March 12, 2002: Message edited by: scoutgrl ]</p>
la mula pescadora
03-12-2002, 02:48 AM
o.k so soa thick part to the front of vheicle in front diferential? i was also thinking of cuting the perches and moving also what about adding longer shackles?
Stolen76
03-12-2002, 01:27 PM
Just had to throw in a curve... If the axle is somewhat twisted, the shims may be in either way. Some shops use shims going both ways to get 1/2 degree changes.
The shims need to go in on a lifted vehicle that previously had NO shims installed so as to angle the pumpkin upwards and lessen the angle on the u-joints.
tuckers89GW
03-13-2002, 04:49 AM
I put mine in sideways :rolleyes:
la mula pescadora
03-13-2002, 05:20 AM
sideways??
porkchop
03-13-2002, 05:25 AM
<blockquote>quote:</font><hr>Originally posted by tuckers89GW:
I put mine in sideways :rolleyes: <hr></blockquote>
?????? This I have to hear about! :D
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