Those measurements were in my first post. GV was 4.5-5 degrees down and pinion was 5 up with the angle finder. Isn't this what one would need in order to cancel each other out for the least vibration at under a full load? Because that's what I find from many sources. So then adding shims to bring the pinion down 2-3 degrees under no load is what I shoot for, right? When the pinion comes up under a load it gets it as close to zero as possible. Right now, with the shims added, my pinion angle is down 2.6 degrees lower than the output shaft on the overdrive unit under no load.