DIY Wheel bearing?

A different rear install will include a different drive shaft and brake fluid at least. Then possibly a different speedo gear for the trans.
Pull the dif' cover , look at gear condition, etc.. Dont grab the gears and turn them with your bare hands. Its a lions mouth ! If it looks like a axle bearing might be all you need, look for the circlips. Post pics.
We'll do something even if its wrong. LOL