Wheel hop

[meowth]

Casa de Mesa Did you ever find a solution? Having a similar experience at the rear right wheel, hops come and go around 20mph regardless of gear.

[Casa de Mesa]

Unfortunately... I never figured it out. And somewhat unbelievably, it just stopped doing it. Which leads me to believe either:

1) the shocks are causing it and I've found the adjustment range where it stops or
2) the diff is causing it as bigjae46 suggests.