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Posi?

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Old May 6, 2010 | 04:00 PM
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Default Posi?

Hello gang.

How can I tell if my "new" 1975 coupe has posi traction?
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Old May 6, 2010 | 04:10 PM
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Originally Posted by kirt8548
Hello gang.

How can I tell if my "new" 1975 coupe has posi traction?
All Stingrays do. But fyi the way to tell is to turn one rear wheel and see which direction the other one turns. Posi will turn both tires/wheels the same direction, whereas std diff. will make them turn opposite directions.

Note that these cars have an unusual rear end and that hanging both tires off the ground in order to turn them will bind at least one of the rear u-joints during the process. So don't be surprised if they don't spin so easy when jacked up...unless you have the knuckle supported underneath and the tires are not hanging at the extent of suspension travel.

Last edited by SanDiegoPaul; May 6, 2010 at 04:12 PM.
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Old May 6, 2010 | 04:24 PM
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Or just spin the tires... if it leaves two lines you have a posi.

For further info watch "My Cousin Vinny" all the way to the end.

-W
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Old May 6, 2010 | 04:24 PM
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In 1970 positraction became a standard in the Corvette. Before that you could get an open rear end.
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Old May 6, 2010 | 08:49 PM
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Originally Posted by SanDiegoPaul

Note that these cars have an unusual rear end and that hanging both tires off the ground in order to turn them will bind at least one of the rear u-joints during the process. So don't be surprised if they don't spin so easy when jacked up...unless you have the knuckle supported underneath and the tires are not hanging at the extent of suspension travel.
Good piece of info there. I always wondered, even made me look for problems that I couldn't find...
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Old May 6, 2010 | 09:56 PM
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Originally Posted by Clams Canino


Or just spin the tires... if it leaves two lines you have a posi.

For further info watch "My Cousin Vinny" all the way to the end.

-W
I remembered that, not only was she smart, but wow what a sweetheart.
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