General Motors has several names for its LSD, or Limited Slip Differential, unit. Commonly referred to as Posi-traction, the exact same clutch-based LSD is also known as Controlled Traction, ...

It's kind of like ordering a pizza just the way you like it and with all your favorite toppings, only instead of ordering extra cheese and pepperoni, you're getting your choice of a limited slip and ...

A fundamental part of any muscle car is a nice, strong rearend fitted with a limited slip or Posi unit. What good is it to make gobs of horsepower if you can only do one wheel burnouts or if the diff ...