“Its first application was GM half-ton trucks.

That diff has changed a lot over the years. We speak in terms of bias as far as its ability to multiply torque from one wheel to the other.” It’s a plate-style clutch limited-slip-differential, and uses pre-load springs to provide initial biasing characteristics of a differential, but it’s not a locker. “The Posi transfers a certain amount of torque over to the wheel that has more traction. On the EATON Posi, it’s about two-and-half times biased toward the the wheel with more traction. Over the years we have upgraded it (different types of gears and different kinds of materials) and now it’s a 100-percent net forged gear profile on the unit. Along with that, we’ve also got our own friction material.

Dana 35 spartan locker drag install#Īs with any plate-style linited-slip-device you have to run a friction modifier, which helps to alleviate a big concern a lot of people notice–the squeaks and squawks–with a posi when they have failed to install a friction modifier.” “The performance posi that we sell on the aftermarket uses pyrolitic carbon coating, which is an extremely durable material derived from materials used for aircraft brakes. The Posi transfers a certain amount of torque over to the wheel that has more traction. – Creager “The posi is almost exclusively for use in rear axles, and allows someone to have a near-stock open differential driving characteristic. It does have a pre-load, so under light traction situations you can get a tire to chirp or drag as you go into a corner, but it doesn’t cause any rear deviation to the chassis.

It works quite well in the performance world.