71 Rivera rear end

[BWINN519]

while out today touring one of my local salvage yards i came across a 71 Rivera with the complete rear end in it, untouch. "sorry but dumn question time", Any one with any ideal of what kind of rear end, were in these ?

[Smartin]

It should be a 9 3/8" 12 bolt...probably a 2.93

Does it have a posi tag?

[BWINN519]

Not sure, was unable to really get under there and look. spent the rear driver tirer a few times, and both did turn so guessing it was a posi. Will this rear end fit in my 68 skylark ?

[Smartin]

Did the tires spin in opposite directions?

It will not bolt into your Skylark.

[BWINN519]

Yes

[Smartin]

You have to jack up the rear wheels and spin one of them and look to see if the opposite rear wheel spins and if so it would spin in the same direction. A open diff. will have the opposite tire spin in the other direction and a limited slip will some times leave the other wheel standing still and slowly start turning in the same direction after a certain amount of revolutions are made by the wheel you are spining by had to check as these work off of clutch plates and need friction to engage them.

[87GN_70GS]

Make sure the trans is in neutral or driveshaft is disconnected. Even a posi with low friction will spin in the opposite direction if driveshaft is not spinning.