Unless it's spent a lot of miles on hard pavement at highway speed, there's probably no wear or damage to the spider gears. I don't think any of the older big rear ends had any sort of limited-slip arrangement available.
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!