spring pack caster shims

GK_Slick

GK_Slick

Member
I put sj 4" lift springs on my Scout and put some 6* caster shims in there. Which is the correct way for those to go in? I was told fat end toward the front. I set mine up this way and also purchased some tw offset u joints to eliminate any binding. I took this set up into the woods once. Now in four wheel drive I get terrible vibration at and above 20mph. It is fine in 2wd. I am not sure if it is at my auto hubs or the drive line but I am pretty sure it is at the drive line. I have considered a cv joint drive line also castor degree sleeves instead of the shims. Any suggestions would be welcomed. Thank you
 
Driveline vibration is the downside with the type of lift that you have. Best way to correct this issue is to have the knuckles turned so that you acheive a suitable driveline angle and castor adjustment.
 
Thanks Jeff. I guess if I had saved what I spent on the tw u joints and shims I could have put that toward the turning. Do you have a guesstimate of cost for a task like that?
 
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The tw joints are what is causing your vibration.

The shims help with ds angle/binding, but it rotates your knuckles forward, so you caster is then screwed.

Why are you driving over 20mph in 4wd? I'm guessing snow on the highway?

Swap in stock spicer joints & see what happens.

If you only do light wheeling, you can grind the yokes a tad for added clearance as well. (it weakens the the strength of the yoke though).
 
gk_slick said:
thanks Jeff. I guess if I had saved what I spent on the tw u joints and shims I could have put that toward the turning. Do you have a guesstimate of cost for a task like that?
Click to expand...

Price to turn knuckles depends on whether you are bringing the whole vehicle or just bringing in a housing. If you bring in just a housing expect to pay $200-$400 depending on where you take it to.
 
Thanks Jeff. Oh well, maybe that is what I will request of santa this year.
Mochamike, thanks for the ideas. Oh, and yes, hi4 on snowy hwys.
 
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