At this point I'm only looking for info on compatibility.
I've never done this with a Corporate Rear, but did do it with a Eaton. The only difference I had in those two was the ring gear was taller on the 2-speed and I needed a small slot ground out of the bolt flange surface so the ring gear would slide in the opening. I confirmed it would fit by drawing a picture showing each mounting bolt/stud and then measuring between every bolt and compared. If they all work out it should fit. I also made 2 long install studs out of concrete anchor bolts found at HD or Lowes with the ell's cut off to guide the pumpkin into the housing. I did it all with the truck sitting on the floor using just a floor jack...the entire job only took an hour or two. You will need to shorten the drive shaft as the 2-speed is longer (yoke to mounting surface) than the single speed.
Mike B
