Depending on how stuck your axles are, I suppose a hammer would be OK. I'm just kind of a stickler for using the right tool for the job. While hammers are a popular tool, they are rarely the right tool.
__________________
Jack
2000 Boxster S - gone -
2006 Audi A6 Quattro 3.2
So I've also got my suspension down and put on HR springs. While out I see the inner boot on my 2002 Boxster S is ripped (48k miles). I don't have an air compressor and my Crafstman 7.5 amp gun won't crack the nut. Do I need a 3/4 electric gun to get it off?