Dynatrac Serious Performance ProRock 44/60 Axle-Set™ for Jeep JK

When strength, reliability, and trail performance matter most, the Dynatrac Serious Performance ProRock 44/60 Axle-Set™ is built to deliver!

Crafted for Jeep Wrangler JK (2007–2018) owners running 33″–37″ tires, this axle set offers race-grade components, modular design, and premium options—all while saving $1,500–$2,500 over buying new wheels plus a separate axle swap.

You get a fully assembled ProRock 44™ front and ProRock 60® semi-float rear axle rigged in the USA. 

Included Axle Assemblies & Features

• ProRock 44™ Unlimited Front Axle
  • Patented nodular-iron, high-pinion center section with control arm bushings preinstalled  
  • 3.00″ diameter × 0.50″ wall tubing—3× stronger than stock JK Dana 44 housing  
  • Dynatrac U.S. forged, double-heat treated 4340 inner/outer shafts with U-joints installed  
  • HD BallJoints™ already installed—“last balljoints you’ll ever need”  
  • Integrated raised track-bar & ram-assist steering brace mounting package  
  • Precision aligned, alloy steel end forgings; built in USA 
  • Modular design: gearbox does **not** include spindles, hubs, or brakes—you reuse your factory components 
    
    
• ProRock 60® Semi-Float Rear Axle
  • Nodular-iron, high-pinion center section for better clearance and strength 
  • 3.125″ × 0.313″ wall tubing—2.5× stronger than JK stock Dana 44 rear housings 
  • Dual-Sump High Volume (DSHV) oiling system ensures outer pinion bearing always has lubrication 
  • U.S. forged, heat-treated 35-spline alloy steel shafts included 
  • Raised driveshaft centerline (approx 2.75″) for clearance over obstacles 
  • HD CNC laser-cut suspension brackets with multi-position track bar bracket for long travel tuning 
  • Rock-proof nodular-iron diff cover included  

Options & Variants

• Selectable locker & gear sets: ARB Air Locker or Eaton ELocker4 with gearing in 4.10, 4.56, 4.88, 5.13, or 5.38  
• Pricing starts at $10,995.00  
• Integrated ram-assist bracket on the front ProRock 44 requires flipping of the drag link 
• If using Reid Racing knuckles, the ram-assist bracket is incompatible—Dynatrac can substitute a first-gen raised track bar bracket instead (contact them)  

Fitment & Use Cases

• Designed specifically for Jeep Wrangler JK (models between 2007 and 2018)  
• Engineered to handle 33″–37″ tires without sacrificing strength or drivability  
• Best suited to off-road, rock crawling, and high torque builds where OEM axles struggle  
• Must reuse your existing spindles, hubs, and brake assemblies from your Jeep  

Important Notes & Considerations

• Because of the ram-assist steering bracket, the front drag link must be flipped during install  
• If your setup uses Reid Racing knuckles, you’ll need a bracket substitution (contact Dynatrac for options) 
• These axles are modular: internal parts (gears, lockers, etc.) are serviceable and upgradeable 
• Lead time and availability vary by variant/locker/gear combination (check with FASS for current ETA) 

Questions? We’re Here to Help.

Have questions about suspension upgrades for your truck? Our team at FASS Motorsports is here to assist:

• Phone: 636-429-7020
• Email: info@fassmotorsports.com