1972 K20 4x4 Front Axle Seal ????

[cwilkie]

Good evening guys. I have a bit of a problem. I am replacing the inner and outer wheel bearings, upper and lower ball joints, spindle seal, axle bearing, axle seal, tie rods, and drag links. I started with driver side. Well the wheel bearings are replaced and in the hub, new ball joints on the knuckle and attached to the truck, and now I'm reading to reinstall the driver side front axle.

Problem. I don't know where the axle seal goes. The first two pictures is the new seal behind the yoke. I assumed it goes inside the tube.

The last two pictures is the passenger side that I have not taken apart yet. It appears there is nothing in between the yoke and axle tube.

Any help is appreciated.