A 1" square drive tire impact wrench with a whittled-down socket comes in handy for removing the pinion nut if you're working on those big rig differentials on a regular basis. Just don't use it to tighten the nuts- - - -it can gall expensive pinion bearings.
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!