Gear Pattern - Pinion Depth

[ck1insac]

Hey guys, my first rear end build on my Chevy 12 bolt. My main question is regarding the straight line at the bottom of my gear pattern. I’ve read several threads where it’s an indication of the pinion being too deep. However, adjusting the pinion, I get similar patterns. I’ve gone down to .020 pinion shim. These pics are using a .030 pinion shim and a backlash around .008. This is a new Eaton TruTrac carrier, and new 3.73 Motive Gears. All bearings and races new as well. I’m in no rush and just want to do it right. Any recommendations or insight would be much appreciated.
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