Limited slip vs. Positraction vs. Safe-T-Track

Q: Limited slip vs. Positraction vs. Safe-T-Track

What is the difference berween a limited slip rear end and a posi? Or are they one and the same? If they are different, were they both available in 1st gen birds? How do you tell the difference.

A: It’s my understanding (someone please correct me if I’m wrong) that they are one and the same. Dealer literature called them “limited slip” while the users called them “posi”. If could also have been the used by two different car builders (i.e., Pontiac/GM called them limited slip while Chrysler called them posi-traction). That’s my guess.

A: There isn’t any difference. Each GM division had its own name for it, and probably a slight variation on the design too. Pontiac’s was actually called Safe-T-Track, Chevy was Positraction, they are both “limited slip” type rear ends.

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