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ProRock 80™

ProRock 80™

The Dynatrac ProRock 80™ is the ultimate rear axle upgrade. Big tires? Big power? No problem! No other axle in existence handles this much torque, has this much ground clearance and is this lightweight. Do your worst. The massive 11.25-inch ring gear, giant 2-inch diameter pinion and 40-spline 4340 axleshafts give the ProRock 80 the ability to handle huge tires, a massive rig and a heavy right foot.

The lightest axle in its class, the ProRock80 has all the beef you’ll need in your JK to handle the largest tires with the hottest motor. Designed to handle just about anything you can throw at it, the ProRock80 has the strength to get you there and back. The ProRock80 is based off of the massive Dana 80. We took the best features of the Dana 80, added in the best features of our ProRock design and ended up with an axle that can handle the toughest terrain. 

No other axle in existence can handle this much torque, have this much ground clearance, and be this lightweight.....PERIOD!

Features and Standard Equipment:

  • 100% designed, manufactured and assembled in the USA
  • Lightest axle assembly in its class
  • Full floating axle design eliminates weight load on axle shafts
  • Unmatched housing rigidity to keep gears in proper mesh
  • 11.25" ring gear and 40 spline axle shafts can handle heavy weight, big horsepower and an aggressive driver
  • Sleek ProRock® housing keeps you sliding over the obstacles, not grinding to a halt
  • Most ground clearance of any axle using a 10.5" gear or larger
  • Integrated upper suspension mounting points
  • Proprietary, in-house developed forgings, housings, spindles, etc
  • CAD designed CNC cut brackets expertly welded for precise fit every time
  • Exclusive Dynatrac JK ABS and Stability Control compatibility
  • 1 year, unlimited mileage, "No-Fault", written warranty- real warranty- not empty promises
  • Exclusive high clearance custom machined Dynatrac ProRock80® standard cut heavy duty nodular iron housing
  • Heavy duty 4" diameter, 1/4" wall lightweight high rigidity Chromoly axle tubes
  • Axle widths available: 68.5 and 72.5 inch, as well as custom widths
  • Matched housing geometry and pinion angle for vehicle's suspension
  • Dynatrac Jeep JK heavy duty 3/16" rear coil spring brackets installed
  • Integrated upper mounting points for flexible link suspension
  • ARB Air Locker differential- 40 spline
  • Massive 11.25" ring gear with 37 spline pinion input shaft
  • Choice of USA-made Dana 80 standard-cut ring and pinion ratio 3.54-5.38
  • Dynatrac Dual Sump/High volume/High Pinion Angle Oil Modification (recommended for 11 degrees or more pinion angle)
  • 1410 input yoke
  • 8 lug (8 on 6.5") wheel pattern
  • Dynatrac ProRock80 heavy duty full float nodular iron wheel hubs, chromoly heat treated spindles and serviceable bearings
  • Heavy Duty J8 Military 13.9" vented rotor disc brake assemblies
  • Dynatrac JK ABS/ESP retrofit
  • Dynatrac ProMax 40 spline 4340 chromoly full floating axle shafts


Optional Equipment:

  • 3/8" or 1/2" wall axle tubing
  • ARB high output compressor kit (CKMA12)
  • 1480 pinion yoke
  • GL-5 gear oil installed

Call 714-596-4461 for more information and a custom quote!

If you're comparing Dynatrac to the competition, you owe it to yourself to read this article: 10 Questions You Should Ask When Shopping for an Off-Road Axle

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