Detroit locker
 

Anyone know if a locker from a gm will fit a dodge?

Probably not. Most products like that are pretty specific on what they will work with.

It should if the spline count is the same and they are both the same model Dana axles (D70, D80). There is also a difference between 4.10 and up and 3.73 and down ratio lockers. Verify those things. Stuff for Dana axles is interchangeable. My jeep front axle was a Dana 44 out of a '88 Wagoneer with '74 Chevy knuckles, '88 Ford Bronco brakes and calipers, and Ford stub shafts :tu: All Dana 44 of course.