Dana 44 BP 3.21 Ratio Thick Ring And Big Pinion Kit Nitro Gear and Axle

  • Sale
  • Regular price $567.00

Nitro Gear and Axle strives to provide the highest quality differential components available. We take the steps necessary to ensure our parts are dependable. Our product range is continually growing to meet the needs of consumers for new ratios and applications. At Nitro we know differentials, and know what it takes to provide you with high quality components. Nitro gears are manufactured from 8620 steel gear forgings in the same manufacturing facilities as GM, Dodge, Ford and Toyota. They are precision machined using computer controlled processes, heat treated, CNC triple-lapped and Rockwell tested for hardness. These extra steps ensure excellent fitment, ideal contact pattern and smooth, quiet operation.
The Nitro Big Pinion Conversion Kit for Dana 44:

  • Offers you a significant increase in strength over your typical Dana 44axle with the later New Generation type gears used in 2007-Present Jeep Wrangler JK axles

The Difference:

  • Larger 24 spline (Dana 60 sized) Pinion shaft which measures 1.25 inches vs standard 26 spline shaft which measures 1.11 inches
  • Larger 8.875 inch diameter ring gear vs Standard 8.5 inch ring gear


  • Nitro Thick Ring and Big Pinion Set
  • Differential: Dana 44
  • Location: Front|Rear
  • Rotation: Standard
  • Gear Ratio: 3.21T (Thick Gear)
  • Material: 8620 Steel
  • Tooth Count: 45/14
  • Pinion Spline: 24 Large Spline
  • Ring Gear Bolts: 10 (Included)
  • Thick Ring Gear Fits 3.73 and Down Carrier
  • Manufacturer: Nitro Gear and Axle
  • Warranty: 2 Years
  • Sold As A Set

The Nitro Big Pinion Kit Includes:

  • Ring and Pinion, Pinion Bearings, Pinion Seal, Pinion Nut, Solid Spacer, Shims, Bearing Spacer and Ring Gear Bolts
  • Also Includes Our 1310 or 1350 Series Pinion Yoke

Tech Note:

  • This is an aftermarket upgrade kit, clearance grinding on the housing will be required

Fits Vehicles:

  • Most Traditional Type Standard Low Pinion Dana 44
  • Some Common Vehicle Applications:
  • 1967-1980 Chevy/GMC K5 Blazer/Jimmy Front
  • 1967-1980 Chevy and GMC Suburban 4x4 Front
  • 1967-1980 Chevy and GMC K10 K20 4x4 Pickup Front
  • 1967-2001 Dodge W100 W150 W1500 4x4 Pickup Front
  • 1967-1997 Dodge W200 W250 W2500 4x4 Pickup (Not Cummins or V10) Front
  • 1974-1993 Dodge Ramcharger Front
  • 1974-1981 Plymouth Trailduster Front
  • 1948-1979 Ford F100 F150 Rearend
  • 1967-1976 Ford F150 4x4 Front
  • 1967-1977 Ford F250 4x4 Front
  • 1972-1977 Ford Bronco Front
  • 1971-1980 IHC Scout II, Traveler, Terra
  • 1970-1986 Jeep J10 J20 Pickup
  • 1974-1985 Jeep Wagoneer
  • 1975-1985 Jeep Cherokee FSJ
  • 1986-1992 Jeep Grand Wagoneer
  • 1967-1975 Jeep CJ5
  • 1986-1986 Jeep CJ7
  • 1986-1992 Jeep Comanche MJ Metric Ton
  • 1987-1990 Jeep Cherokee XJ
  • 1997-2006 Jeep Wrangler TJ
  • 2003-2006 Jeep Wrangler Rubicon TJ
  • 2004-2006 Jeep Wrangler Unlimited LJ
  • 2005-2006 Jeep Wrangler Unlimited Rubicon LJ
  • 1965-1968 Sunbeam Tiger