[Bigdav160]

Dana offered three different differential cases for the Dana 60.
An open case - non limited slip.

The Trac Lok which is a clutch based limited slip differential case usually offered in car lines.

And the Powrlok which is a limited slip with a movable pin to exert even more power to the clutches.

The aftermarket has many choices for the Dana 60 including cable, air and electric actuated lockers.