Got the seal off today and the new one in, the old seal was completely plastic and twice as long. All the pics I've seen of the seal online was a metal ring with a rubber seal on the inside. I'll post a picture showing the comparisons. The problem ended up being the tool, I had to file it down so it could actually insert the threads in and then it came out pretty easy. Haven't checked to see if the shifting is still messed up, I think I forgot a washer on the shaft connection (with the cotter pin) and it was allowing some play in the movement. Gotta do the axle fluids then I will check.