Just trying to finish up my bros dana 60 swap in in 97 ccsb f250 and we have a problem. We were putting the spindles back on and as far as I know it goes it's brake dust shield, then spindle, then rotor. Well problem is the spindle pushes the axle shaft in too far and spindle will not tighten. What part is missing to space the spindle and steering knuckle? Help would be really appreciated!