19. ear setups are a crap shoot: Some go easy with just one or two trial setups, and some can take a dozen or more before you get a good pattern. This one turned out to be the latter. Always start with the same shim thicknesses as the original gears and work from there. In this case, the original shims were really corroded and difficult to measure, and there was plenty of evidence that the last guy to put gears in the housing had no business being there. With the final piece of the puzzle in place, we buttoned everything up and prepared to wrestle our beefy new Dana 60 under the Jeep.