If there's one thing I'm learning fast with this hobby, is that the simplest of jobs lead to the most complicated of procedures. Replacing a leaking oil seal on my '51 6400 has led to all the wheels coming off, new tires, and possibly six new wheels! It's easy to get going on a project, and before you know it, you've taken half the truck apart!!!
It's the putting it back together the right way that's hard!
-Michael