Hey, this is something we can definitely believe in!!
If you own a Wrangler YJ, TJ or JK and you're looking for a little (or a lot of) axle beef, the cool dudes at Dynatrac have got a hot piece for you. The TRAILSeries 44 axle, which includes the same 100-percent American-made components used on the company’s Pro Series axles, fits 5-on-4-1/2-inch wheel patterns found on Jeep Wrangler YJ and TJ, and 5-on-5-inch wheel patterns found on Jeep Wrangler JK models.
How stout are these puppies? How about 30-spline induction-hardened steel axle shafts; increased-strength new-generation Dana 44 ring and pinions with bigger bearings; larger and more robust U-joints; your choice of gear ratio (from 4.10, 4.88, 5.13, and 5.38:1); an electric, selectable locking differential; massive13-1/4-inch front and 12-½-inch rear disc brake assemblies and parking brake; standard-cut rear (pictured) and high-pinion front axle housings; a Pro Series nodular diff cover; and a 12-month unlimited-mileage warranty? Hey, like we said, these are some beefy 44s. So mosey on over to Dynatrac's Website for more information on the TRAILSeries 44 axles, and git yore Jeep ready for some serious wheelin'.