Aged (hard) tires.
Excess clearance in the lower hub carrier
bearings, wheel bearings or inner control arm bearings.
Check and adjust bearing play. See
Use of urethane or other soft bushings
in place of the OEM bearings.
"Revert" to standard tapered roller bearings.
Soft upper subframe mounts
Replace mounts (Jag steel sheetmetal cage), or bushings (ERA tubular cage)
Too-soft damper settings or worn dampers.
Set the dampers as described in the manual. The adjustment is a small
screw near the bottom. You can experiment by going significantly stiffer
on all 4 dampers to see if that effects the hop.
If it seems like the damping is significantly soft with more than 5 clicks
off soft, you may have a bad damper. That can only be checked effectively
by removing the damper from the car and removing the spring from the