Quick update: I went ahead and ordered a whole kit for re-gearing the D44 front axle to 4.56. I had to get a new carrier, so I went ahead and bought a tracklok limited slip diff to match the traclok in the rear. New axle seals and shims and bearings all around. The hard part will be finding time to do the swap, since it will likely take me all day. The rear axle will only take me a couple of hours since I've rebuilt it a few times before already and know what to do, but the TTB D44 will take a little more time and effort.