Cab mounts are about two years old. Are there others? I pulled both shocks and there was no difference. Also loosened the shackles and bounced the front end of the truck a while but that had no effect. I checked the tires and they are evenly inflated. Also checked to make sure that they didn't send me mismatched shackles but they are the same on both sides. Both leaf springs are sitting on flat metal shims that are about 5/8 inch thick. I'm wondering if that was done to correct some condition that existed with the old springs. If I remove the shims from the passenger side and leave the drivers side shims in place, that ought to level the truck out. But would that have any effect on handling/tire wear? I will double check the cab mounts in the meantime and make sure all is well there. I did not replace the rear leaf springs yet by the way, though will be doing so next week. I don't know if that has any bearing on what's happening up front.