I think the 33 are the same as my 38, to remove axles you need to remove the differential centre cover (be prepared for a 1 quart of oil), then on the centre casting there is a small bolt the holds a square block between the axle ends to be removed, rotate the block and slide it out, the axles can then be pushed in and a small clip removed which allows the axle to slide out.

Tony   

@anthony-williamson Thanks, Tony.  Need to find that "small bolt".  Did not see it!  Appreciate your insight.

The small bolt is parrallel to the axles and goes through a pin that slides out of the square spacer. It is several years since I did my diff so details are a bit foggy considering near 50 years of broken motor cars though if I had my hands on the job wouldnt be a problem.

Tony