Update
A couple of new developments this morning. The dust shield/parking brake assembly was very difficult to remove yesterday. Basically it was stuck on the axle and only came off when I used a hammer on backside in several places. I decided to measure the end of the axle tube to see if it was out of round. Line "A" from the diagram below measures about 1/32" longer than line "B." I then measured the inside diameter of the dust shield and it is true in both directions. However it measures 3 & 10/64" and the outside dimension of the tube for line A is closer to 3 and 12/64." This shield isn't going back on without some coaxing. I'll look into getting a slide hammer as suggested by some of the replies. I have no clue what the acceptable variance is on these dimensions. The measurements seem to indicate that the outer end of axle tube is slightly out of round.
The other thing I noticed was that the collar that holds the bearing on the axle shaft in place (letter A in picture) was further up on the shaft when compared to some others I found on the internet. I'm not sure what this points to. I assume there is a set distance where the collar is supposed to be located. I compared mine to a picture of a new one below.
Mine:
New One:
I"m not sure what this indicates either. I had new seals and bearings put on less than a year ago. It could be that the shop didn't install properly. The collar sits very tight on the shaft and won't budge, it would have taken a lot of force to move along the shaft. Thanks everyone for the replies and good lucks. My next step is to order a replacement shaft with the bearing already pressed on. I'm not sure what to do about the housing being slightly out of round. I could grind out a little material from the dust shield to make it go back on without have to use a BFH although I will look into getting a slide hammer also.