Something I don't see mentioned, and I've wondered this myself. I understand the two metal rings and the cork gasket between them on the rear retaining nut and their purpose. Would the tube need to be able to slide back and forth, (or in and out), to allow for flex? Same concept as the front yoke does on an open driveshaft. Or is the accommodated by the rear yoke inside the ball housing? The trans yoke bolts on, so it ain't moving. Logic tells me the rear yoke handles the flex. I have not looked in my shop/service manual yet, and this info is probably in there. Just asking from those that have done it.
Mike
1951 3100
