THEN SUDDENLY (and you knew this was coming), the steering wheel
suddenly started oscillating back and forth at about 30 degrees or so each
direction (left & right). Very rapidly, very suddenly.
"Death Wobble" ...
Look for looseness in spring bushings, mounts, shackles, tie rod, drag
link, steering box & mount, ball joints, etc.
Contributing factors include changes in geometry ( extra long shackles ?),
often exacerbated
by wear in other parts.
Some modified Cherokees get death wobble when their uni-body gets springy.
So look for anything that allows motion not expected by the designers. A
fellow on Pirate 4x4 cured his Scout DW with all new front bushings.
-Bob