replacing Ball Joints, 4600lb axle or 3850?
I am trying to order new upper and lower ball joints for my OBS PSD F250. Napaonline.com shows the narrowest selection (there are even more options at rockauto.com). The upper ball joints are easy as there is only 1 kind...But, for the lower, there are two options: 1) 4600 lb drive axle and 2) 3850 lb drive axle. Both appear the same as pictured, and are greaseable joints.
I would hazard a guess that my TTB is a 4600, but I really have no idea? Can someone help me on this?