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Dynatrac Serious Performance Extreme ProRock 44/ProFloat XD60 Axle-Set™ for Jeep Wrangler JL

Vendor: Dynatrac


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The Dynatrac Serious Performance Extreme Axle Set pairs the Dynatrac ProFloat XD60 rear axle with the Dynatrac ProRock 44 front axle for unprecedented durability and strength, and with more ground clearance than any other axle housings in their class. Never before have these two axles been available as a package set.

The ProFloat XD60 rear axle was engineered to provide the strength of a full-float rear axle, but without the heavy weight – it’s up to 100 pounds lighter than many full-float axles. It features an advanced-technology housing that virtually eliminates flange bending, even with tires up to 40 inches in diameter. 

The ProRock 44 front axle features 60-class 35-spline inner axleshafts and 1480 axle joints – these are the same sized shafts and joints used on the Dynatrac ProRock 60 axles for decades – making this the strongest 44-class axle available for the Wrangler JL. It also gives these Jeeps the largest steering joint available in a 44-class axle. 

What You Get:

ProRock 44™ Unlimited Front Axle

  • Dynatrac-exclusive patented ProRock® nodular-iron, high-pinion ProRock 44™ centersection with control arm bushings installed.
  • Best-in-class ground clearance and more ground clearance than a factory Dana 30.
  • 3.125-inch-diameter x ½-inch-thick wall tubing that is 3 times stronger than any stock JL Dana 44 housing.
  • Dynatrac’s forged, double-heat-treated axleshaft assemblies are included. You get our latest inner and outer 4340 shafts.
  • 1480 steering joints -- the same shafts and joints used in ProRock 60 front axles for decades.
  • Dynatrac HD BallJoints™ are already installed; the last balljoints you’ll ever need.
  • Dynatrac precision-aligned, alloy-steel end forgings.
  • ProRock 44™ Unlimited housing geometry for superior handling and optimal pinion and driveshaft angle for lifted JLs.
  • Rock-proof nodular-iron Dynatrac diff cover.
  • All HD suspension brackets are CNC laser-cut and professionally welded and installed.
  • Axle includes ARB Air Locker and your choice of available selectable lockers and 4.10, 4.56, 4.88, 5.13 or 5.38 gear sets.

*This ProRock 44™ assembly does not include spindles, hubs or brakes -- customer is to reuse the spindles, hubs and brakes from their Jeep.

ProFloat XD60™ Rear Axle

This all-new advanced axle housing and axleshaft design provides the following upgrades in strength:

  • Major bearing offset improvement to greatly reduce cantilever effect of loads at the wheel.
  • Significantly thicker flange section at the wheel bolt circle.
  • Much larger shaft-to-flange transition radius, with tapered flange skirts for extra flange stiffness.
  • Bearing journal is larger in diameter than other performance semi-float axle shafts.
  • Seal journal is significantly larger in diameter than performance semi-float axleshafts.
  • Heat-treated chromoly 35-spline axleshafts.

In addition, the ProFloat XD60 is up to 100 pounds lighter than comparable full-float axles. This is unsprung weight, further improving the on- and off-road driving characteristics of the vehicle.

Because the ProFloat XD60 is not a full-float axle, customers can retain their existing wheel, saving costs when upgrading to larger tires. This new design uses off-the-shelf, heavy-duty F-150 brake assemblies for great performance and ease of procuring replacement components. The brakes are compatible with Wrangler (JL) ABS/ESP.

The ProFloat XD60 includes all of these standard ProRock XD60® features:

  • Dynatrac exclusive patented ProRock® nodular-iron, ProRock XD60 center section with optional bearing bores to handle oversize pinion and carrier bearings for elite housing rigidity.
  • Low-pinion, standard-cut gearing for ideal rear-axle application.
  • Optional high-pinion, reverse-cut gearing is available on request.
  • More ground clearance than any other axle housing in its class.
  • Best strength, best ring-and-pinion gear support and stability.
  • High-capacity carrier-bearing saddle structure.
  • 7/16-inch cover bolts – cover now adds additional structure to the housing.
  • O-ring cover seal and hard contact mating surfaces.
  • 4.0-inch diameter, variable wall thickness, lightweight, chromoly tubing has the highest strength-to-weight ratio compared to any other light-truck axle on the market.
  • Dynatrac exclusive Dual-Sump High Volume™ (DSHV) oiling system to ensure the outer pinion bearing is never without lubrication
  • Axle includes ARB Air Locker and your choice of available selectable lockers and 4.10, 4.56, 4.88, 5.13 or 5.38 gear sets.

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