Im at a lose of what to do. Have 2013 BMS sportmod. scale # are left54.25,rear56.80,cross49.70and 47bite.These are real close to recommended builder specs. The prolbem is on a dry slick track the rear end hops like a rabbit.Being new to this class im not sure where to go to smooth this out . It works good in the corners until you hit the straights. A little more info, i have 4degree of pinion angle and the track bar is at 20 degrees. Any ideas, thanks