I put a waggy D44 undre my YJ w/SOA. I rebuilt the whole thing - ball joints, tre's, bearings, tie rod, drag link. 36" iroks on 15X8 beadlocks with only 2" of backspacing made for a crappy drive. Loads of wobble. Tire powder helped a bunch - so did adjusting the tow in a bit. Full air pressure helped a bit too. Now the problem is almost not there.

With 35" radials on wheels with 3.5" backspacing - no wobble.

Based on information here - I tried wheel spacers on the iroks. With one inch of backspacing - it was worse. I chalk mine up to improper scrub radius and crappy tire balance.