Absent the factory tool (which you can't beg, borrow or steal), you need to take the axle to someone with a big press. There is a thread on this site with the design of a puller that would work, it is not worht the effort for a one off job. HOWEVER, I did mine (59 TR3A) last year and did not have to take off the hubs. Take it apart by the bolts that hold the backing plate, pull out the axle, and take a look.
Bob