So went from a Posi and stock axles to a Strange spool and axles this past winter on my Mom's bracket Duster. Now the car is un stable going down the track. It just moves around and searches a lot. I thought maybe the spool was highlighting the fact that the frontend didn't have much caster so I rebuilt the frontend with all new ball joints, tie rod ends, and new QA1 upper control arms with 3.5 degrees of caster. This didn't change the way the car handles at all. It has old Comp Engineering shocks on the back with HD springs and the front has some old Koni shocks. All the suspension and tires have been on the car for a while and the only change that seemed to cause this problem was the spool and axles. Any ideas what may be causing this issue?