fucking diff blew up im my crappy hairdressers flippy floppy lights mazda!

was drivin along the other night, and, bang, then lots of whining out of it, now theres lots of slap in the prop (bout a quarter of a turn) and you can move it in and out a couple of mill, im not arsed taking it out at the moment, but does anyone that knows things know what it could be, im thinking the pinion bearings after collapsing cuz some cock eyed english cunt cant setup backlash properly! anyone any ideas?