I’ve put together three more Tech videos for beginners; the rear axle is specific to the full-float Dana 60 on a J-20, but the procedure for the front Dana 44 will be the same on all disc-brake full-size Jeeps from 1974-1991:
Disassembling the front D44 wheel hub down to the knuckle:
https://youtu.be/PjMAzTg5H_0
Reassembling the front D44 wheel hub:
https://youtu.be/jvMJBz01KYw
Disassembling and Reassembling the full-floating rear D60 wheel hub:
https://youtu.be/8Zqnmj343zY