The ABS system won't work if one axle has ABS & the other doesn't. If you want ABS, it should be a relatively simple task to find a pair of D44 axle shafts that have the required tone rings since later model Dana 44 equipped TJs had ABS as an option. Once you install the axle shafts with the required tone rings, it is a simple matter to transfer the sensors from your old axle to the brake backing plate of your replacement axle.
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