Originally Posted by s3nt3nc3d
Except on the TJ with mild lifts (under 5 or 6"...something like that), I believe the caster is non-adjustable...only the toe-in can be adjusted. If you have a higher lift with adjustable control arms, then the caster (or is it camber?) is adjustable.
camber can only be adjusted with offset balljoints. camber should never go out though. if it does, you've got a bent axle or broken tie rod, balljoint, etc.
you're right, usually mild lifts don't reduce caster enough to enduce DW. but even a mild lift, means bigger tires, and that leads to too much toe in, also a known culprit of bumpsteer and DW. if caster is already messed up before the lift, it's 50/50 it'll get worse. caster is the major player in why stock jeeps don't ride like lifted ones. the caster angles are different.
generally at 5", or 6" of lift, you have no caster so you're forced to deal with it
but different CA's can be purchased for small lifts to correct bumpsteer, DW, or handling issues brought on by too low of caster. adjustables are overkillish though with mild lifts
caster can always be adjusted. this is how we bring in pinion and driveshaft angles. thing is though the more lift, the tighter the wiggle room is. a stock jeep can have 4, 5, 6 degrees of caster. lifted, depending on height, now the max could be 3 degrees. if you have DW, adjustables are now needed as the stock arms won't let you adjust over 3 degrees, but the adjustable arms can get you back to 4 or 5 or whatever you're after.