Your front D44 is more Dana 30 than Dana 44. The only thing in a Rubicon's front Dana 44 that is truly Dana 44 is its center pumpkin, ring & pinion gears, and inner axle shaft. EVERYTHING else is pure Dana 30... knuckles, axle tubes, inner/outer C's, outer stub shaft, ball joints, brakes, u-joints, steering, etc. And what is it about the Rubicon's front Dana 44 that doesn't hold up to 37" and bigger tires? All its Dana 30 components.... especially its ball joints.
I'm running a Rubicon with a beefed up front D44 including Superior Axle hardened alloy axle shafts, Warn "big" hubs, and CTM u-joints. And I'm still limiting its tire size to 35".