Caster can be used to compensate for road crown by setting the drivers side 1/2 degree less positive than the passenger's side. For instance, if the pass. side is 4 degrees +, the driver's side should set 3.5 degrees +. When the IFS system was installed, was any attention paid to setting it up to the original steering geometry? It sounds like the crossmember is tilted too far forward, causing the caster to be zero, or possibly a negative angle. If it's bolted to the frame, it might be possible to install shims at the rear of the X-member to tilt the whole assembly back a bit, then tweak the adjustment with the individual sides to make it track correctly. If it's welded, you'll need to do all the correction with the upper control arm shaft shims if possible.
Jerry
Last edited by Hotrod Lincoln; 12/02/2008 4:43 PM.
