Always start with the original shim thicknesses when re-gearing an axle. In only the second time in the probably 30 or 40 gear swaps we’ve done ourselves, the ring-and-pinion set up perfectly with the original shims. We had to make a small adjustment to the backlash and the pinion bearing preload, but this is a testament to the quality control of both Eaton and G2. This also cut the gear setup time in half and was a thankful reprieve in what was otherwise becoming a lengthy project. We buttoned up the diff with a Dynatrac differential cover.