Open or Suregrip?

1975Scamp said
I have a 8.25 rear, I have done the jack up and spin wheels test and they spin opposite directions. So, it appears that I have a open rear. But sometimes I get both tire to spin why is that?

Remove the 10 bolts on the rear cover and see what you have for sure.

RustyRatRod said
If that was completely dry pavement, you have a sure grip. The clutches are probably worn. Did you do the spin the tire test in park or neutral?

Don't all 8.25 have the cone style sure grips?