Not to long ago, I did an axle flip on the old truck to lower it, and also used drop shackles. The axle was originally under the leaf springs, now its rests on top. Ever since the flip, If I "accidentally" break traction, it starts to hop really bad. It starts off spinning, then begins to hop so bad it feels like something is gone break..any ideas what the cause would be, and what can I do to prevent it??