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Dynatrac ProRock 80 Rear Axle Assembly - 2007-2018 Jeep Wrangler JK JKU


The Dynatrack Prorock 80 rear axle assembly for Jeep JK upgrades your Jeep Axle for serious off road performance! Call anytime for help selecting the right off road axle upgrade for your rig 1-855-463-3762.

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Heavy, scrawny, low clearance axles, meet your maker! Introducing the Dynatrac Ultra High Strength ProRock 80 Rear Axle Assembly for Jeep JK's; featuring unrivaled strength, extreme ground clearance, and lightweight.....truly something to take home to meet Momma.

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.

Dynatrac is no stranger to solving high torque and abusive drivetrain problems thanks to over 25 years of experience manufacturing high durability axles for the toughest off road applications. And the NEW ProRock 80 is their latest release to prove once again that they stand alone at the top. The ProRock 80 utilizes high strength, 11.25", OEM quality gears that are 80% stronger than industry standard Dana 60 gears. The superiority of 4.0" diameter axle tubes and Dynatrac's patented ProRock high ground clearance design, provides unmatched housing rigidity that severe-duty JK's demand!

All ProRock 80 assemblies come equipped from Dynatrac with MASSIVE 40 spline full float axle shaft assemblies for the ultimate in strength. The ProRock 80 only sacrifices the thickness of a pencil in ground clearance compared to any standard Dana 60. Furthermore, it is estimated that the new Dynatrac ProRock 80 is the lightest axle in it's class and only weighs 30 pounds more than the famous ProRock 60.

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 width- 68.5"
  • 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

NOTE: There is typically a six week lead time for shipping the ProRock 80 from the time the order is processed. If you have any questions, please ask.

As always, all Dynatrac products are

Dynatrac ProRock 80 Rear Axle Assembly - 2007-2018 Jeep Wrangler JK JKU fits the following vehicles:

  • 2007 Jeep Wrangler JK
  • 2008 Jeep Wrangler JK
  • 2009 Jeep Wrangler JK
  • 2010 Jeep Wrangler JK
  • 2011 Jeep Wrangler JK
  • 2012 Jeep Wrangler JK
  • 2013 Jeep Wrangler JK
  • 2014 Jeep Wrangler JK
  • 2015 Jeep Wrangler JK
  • 2016 Jeep Wrangler JK
  • 2017 Jeep Wrangler JK
  • 2018 Jeep Wrangler JK