If the front drive train always spins has anyone put in a free spin kit or Selectable hubs?

It looks like the aluminum wheels would have to be replaced.

Would the fuel mileage increase be worth the expense?

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'06 Jeep Liberty Sport CRD with: GDE Hot Flash and Tranny Flash, ehm, Cummins fuel pump, 3" Magnaflow muff, Moog K3199's, Skids, 225-75-16 10 ply, OME springs, Euro T/C, Shift kit, Trans cooler w/thermal bypass, Bigboy bkt, Samco CAC, Brake controller, Trans temp gauge, Al's Upper Arms

No one makes them for a KJ,alot of fabbing would be needed to run such a mod(new knuckles and unit bearing along with the hub kit),cheaper to do a SFA swap.I have been running without my front driveshaft and both front CV's for a week now and zero improvement in mpg's.

My brother emailed Warn about some free wheelers last year and they replied that they were not planning on making any.

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Manure green 2005 CRD sport4x4, GDE Hot tune, Cat Gut, OE skids, Draw tight hitch, Duramax lift pump, 160K on multiple varieties of fuel, XM radio, Escort live with Redline, fog light mod, GPS, Icom IC7000 all band radio call sign KC9QPF, Grabber AT2s on Soft 8s, FIA grill blanket.