Hello I have a 1993 f-250 with a 7.3 nonturbo it has the dana 50 twin I beam axle on the front. I have both sides on the front apart right down to the axle stub because I'm doing ball joints. I am replacing the seals that slide on the axle stub and the passenger side axle stub had a collar that the end of the seal slides on and the right side doesn't have one. Is it suppose to have one. If so can I just slide the seal on it and put everything back together and drive on. I will include a picture of the passenger side one so you know what I'm talking about. Thanks

 

No such thing as a Dana 60 twin I-beam.

You have a Dana 50 if its got the twin beams.

 

Dana 50 twin traction beam. Either way, i would look up the replacement parts and have a gander at them. A sleeve or collar couldve been installed if the seal was replaced before in order for the seal to not wear in the groove the old seal created. Dunno on an axle seal, but common on main seals.