First thing that comes to my mind is alignment and caster..what is your toe in set at? I measure mine like this
![](http://i34.photobucket.com/albums/d126/dirtoyboy/IMG_1592.jpg)
Also, do you have steering stabilizer? What method did you use to tighten your wheel bearings? are you following FSM torque specs for shackle bolts, steering arms, etc...
and finally how close were are your leafs to being parallel? Mine measure at less than 1/16th"