Sure grip and rear end question

BUCKEYE FAN said
so if you have a rear end with the third member installed and axles in, how can you tell if it’s a sure grip without removing the third member?
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BUCKEYE FAN said
so if you have a rear end with the third member installed and axles in, how can you tell if it’s a sure grip without removing the third member?
Click to expand...
Should be able to jack it up and spin the rear tires by hand. If they turn the same way its sure grip, If they spin opposit its not