Jeep XJ Cherokee Transfer Case Drop (rear differential alignment, part II)

This is a video showing the process for installing a 1" transfer case drop, along with the calculations of double cardan rear driveshaft and pinion (rear differential angles).
With a double cardan rear driveshaft, it's necessary to get the differential (pinion) pointing directly at the driveshaft, in order to prevent driveline vibrations. In my case, a change in my rear leaf springs and shorter shackles resulted in a fairly large discrepancy between the two angles. The first portion of this job was to install 8° shims, which left the angles about 3° apart, still resulting in some vibrations at speed. The transfer case drop corrected that to within about 1°, which is nearly perfect, as the differential will "wind up" a bit under acceleration, due to the leaf spring suspension.
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