also if your in a ranger and the rear end is hopping on burn outs its cus theres not much weight on that ass end also. is not all just axle rap, but ya the new suspension should help you out there quite a bit. also try changing your shocks 1st if its still just a stock suspension. my iroc hopped bad like that when i dumped the clutch and lit the tires up but i changed the shocks out for sum good 1s and it stopped hopping. now i dont claim to know alot about air ride or stuff like that but i do know that wheel hop has got alot to do with weight tranfer when you do burn out and launches. new shocks will help out with that transfer