You will probably find that it's almost impossible to remove the old bushing without completely dismantling the axle and driving it out the front of the torque tube with a long piece of pipe and a big hammer. Most people just drive the old bushing back far enough on the shaft to install the new one ahead of it. Someone a little more familiar with the replacement bushing will probably come along and either confirm or deny this idea.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!