It's a Pete Jackson "noisy" gear drive unit. All it needs is the cam button and the cam bolts. It's one of these: PJ Gear Drive at Summit Racing Pictures are available upon request. Asking $75 + shipping for it. Also, I have a NP208 x-fer case. Unknown mileage. It worked just fine the last time I had it in the truck, no strange noises, and stayed in all the gears. Asking $75 pick-up only.