My '92 RR developed a severe vibration, most noticeable under accel or braking. I got underneath and when I roll the tires slightly, I see the whole front axle pivots forward or backwards. I'm suspecting this pivoting is happening when under braking or accelerating load and causing the front shaft UJ to bind and shake. How hard is it to change these bushings?

Also, is it worth getting caster-corrected front radius arms? I have 2" spring lift + 2" body lift (which should be irrelevant) and running 285x75 tires.

 

I replaced all of the bushings on the front radius arms. Wow, what a difference! Its like I'm driving a new vehicle; the handling is so much better. It took me 6 hours to do this job, and I was able to beat out (and carefully beat in using a socket) without having a press. The tie-rod only needs to be removed on one side. The vibration still persists, if not dramatically better. The U-joint may have failed already. I would recommend having this job done to anyone who has a Classic and hasn't done it already.

 

If you haven't already done so, replace the bushing on the panhard rod. They really take a beating.