:confused:
I have just bought a 84 cj-7 with a rancho lift , I think it is a 2.5 " and con-ferr shackles (1.5") lift. 33x12.5x15 swampers, the front also has 2degree shims in the front (I am guessing they put them in to help with the caster due to the shackle lift). I had to install a drop pitman arm to help with the bump steer. Also which direction should the shims be installed. They were installed (thick part to rear) so as to move the pinion up even more causing even less caster but when turned around (thick part to front) at around 35 - 40 miles an hour i sometimes get a violent shacking in the front wheels. Should it have the shims at all or leave them and have a alingment done.

Ok, yes having the thick part in the rear would add negative caster. It sounds to me that the shaking is a completely different problem. I'd check your wheel bearings, ball joints or something like that. How long are the shackles center to center. I'd go with a smaller shackle. You should be able to clear a 33'' tire with 2 1/2" lifted springs easy. Having someone do an alignment on a jeep is a waste. All you can adjust is the toe in and how straight the steering wheel is. I can explain it if you'd like.

Tires probably need to balanced if they were wheeled on and start shaking at high speeds.

Oh, and get rid of the Confer's

Just like I said, shims to front if you're SUA. The shackles don't make a dime's bit of difference. Just get the right castor and the shaking should stop. Those shims may not be enough with that much of a lift shackle. Fix the castor, then come back. 6*



wtf? I thought I was in newbie land. Ohhhhh wait, this is jeep land. Same difference these days I guess.

Were and how is the best way to measure the caster on the axle my self?
:confused:

:cow: