If you are driving a Motorhome that's wagging it's tail.
TRAC Bars. You can use a maximum of 2
one front
one Rear
I went with front (Cheeper) and found it was enough but two of 'em (one each axle) will stop "Wag" 100% dead in its tracks. Absolutely stop it. Not "Reduce" but STOP IT DEAD. Eliminate.
FOr Ford or Workhorse rear go to Ultra Power.. Workhorse front I went with a Davis.