Need help with ford 8.8 rear

I'm inclined to agree with Rob on this one.

When you set the carrier down in the housing with all the bearings/races/shims, it rotates freely without the caps installed? When you set the caps on, do you step torque the caps? Have you tried spinning the gears from the pinion? Does it turn with the required amount of preload? Is there anything binding the races that you can see? Have you tightened down the caps without the carrier to check for correct mating? Do you have and pictures of what you're describing? Are you trying to stack too many shims in the left side? (too little backlash)