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Does a Trans Am have a positive traction differential?

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November 23, 2009 7:34AM

Some do and some don't. The quickest way to tell if you even have a Limited Slip or Posi-Trac is to jack both rear tires off the ground at the same time. Then try to rotate one side in one direction or the other. If you have a LS the other tire will follow along but maybe a little slow or not respond to your movements real quick. That depends on how tight the clutch pack is. If you have an open diff then the other tire will rotate in the opposite direction.


I can say this with absolute certainty, every single T/A from 69-81 was equipped with a Posi...No matter whether it had high or low gears in it. Once GM took over in 82 and the T/A was more Chevy than Pontiac I can't say.