Ok here is a picture of the front of my CGM....
showing the problem at hand.
I assure all observers that the diff is assembled correctly and in the right way. The dogbones are the same length and the correct axels are being used and the arms are even the same length. I even moved all the shims to one side to move it over further just to see if it made a difference and it doesn't.
Clearly you can see the left side is much closer to where the outdrive ring goes than the right side.