yesterday i went to go service my wheel bearings and had a problem getting the hub undone. i have no experence with mile marker hubs so i don't know if there any different. here is my problem, i have a 1975 k10 with a 203, stock it didn't have hubs so i am quessing the guy before me installed them. i got the cover off and the snap ring that hold the main body in but when i tried to remove the main body it didn't want to come out. i could move it about a 1/4 of a inch but then seems to hang on something. is there a special part in side that i am missing. any comments are appricated.