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4.56, Nitro Thick Ring & Big Pinion Kit
for Dana 44BP

Nitro Big Pinion Dana 44 Kit

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Price: $519.74

Product Code: D44-456BP-T-NG

Description Vehicle Applications Warranty Information

4.56 Nitro Ring & Pinion
for Dana 44

Nitro's Big Pinion conversion kit for Dana 44 offers you a significant increase in strength over your typical Dana 44 axle with the later “New Generation" type gears used in 2007 & newer Jeep Wrangler JK axles.

The difference:
- Larger 24 spline (Dana 60 sized!) Pinion shaft which measures 1.25" vs. standard 26 spline shaft which measures 1.11"
- Larger 8.875" diameter ring gear vs Standard 8.5" ring gear

Nitro "Big Pinion Kit" Includes:
-Ring, pinion, pinion bearings, seal, nut, solid spacer, shims, bearing spacer and ring gear bolts.)
-1310 or 1350 series pinion yoke.

Differential: Dana Spicer Model 44
Gear Ratio: 4.56
Tooth Count: 41/9
Pinion Splines: 24 Large Spline
Ring Gear Bolts: 10 (included)
Manufacturer: Nitro Gear & Axle
Warranty: 2 Years

Tech Note:
This is an aftermarket upgrade kit, clearance grinding on the housing will be required.

Nitro gears are manufactured from 8620 steel gear forgings in the same manufacturing facilities as GM, Dodge, Ford & 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.

Nitro Gear and Axle Premium Differential Ring and Pinion Gears, Axles and parts


This product can expose you to chemicals including toluene and benzene, which are known to the State of California to cause cancer and birth defects or other reproductive harm.
For more information go to: www.P65Warnings.ca.gov

  • Fits most “Traditional” type standard “low pinion” Dana 44
  • Includes ring, pinion, pinion bearings, seal, nut, solid spacer, shims, bearing spacer and ring gear bolts.
  • Your choice of 1310 or 1350 series pinion yoke.
  • Larger

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