No worries, Jason... let's see if I can do better -
This pic shows axle assembly w/o locking hub or fixed flange installed. http://www.wsu.edu:8080/~i6735189/dischub.jpg
Inside is the axle shaft (external spline), the engine drives this. The wheel hub has internal spline. These spin independent of eachother until linked.
A locking hub allows link from wheel to axle shaft to be conntected (locked) or disconnected (unlocked) with twist of dial. Fixed drive flange is always locked (fixed)... the link is always connected when a flange is installed.
Most likely the axles are from 1973-1980 Quadra-trac equipped Jeep Wagoneer (both D44s and both diffs offset to pass side). These Jeep D44 axles were not equipped with manual or auto locking hubs from the factory. The QT system was full time all wheel drive. No need to ever disconnect the front hubs therefore fixed drive flange was used.
Aftermarket locking hubs are available for D44 axles.
I couldn't find a good image to show difference between locking hub and drive flange... but here is a locking hub from Warn site http://www.warn.com/warn.nsf/pages/T...s.Premium.html
A fixed flange is similar but but it is just a hunk of machined metal - does not have mechanism to unlock.
Hope this helps to understand what I mean to say... for more info or more clear info - try some searching on google.com for "locking hub", "drive flange", "Dana 44", etc. Should find some good info or maybe even an exploded drawing.