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Double Black Offroad

JT Dana Spicer 44 Ring & Pinion Thick Set 4.56 Nitro Gear


Nitro Ring & Pinions are among the best in the industry. By using better materials, machining, heat treating and lapping process, Nitro can ensure a strong, quiet running, long lasting setup. Every new application is put through multi point inspections and actually installed and set up by Nitro's in-house differential experts to ensure excellent fitment and easy setup. At Nitro we see strive to meet consumer demand for new ratios and applications, and we are continually developing new products to stay ahead of the competition.

Product Details & Specs
  • Precision machining & heat treating processes ensure strength and excellent fitment.
  • CNC gear lapping ensures ease of installation, excellent contact patterns and a quiet running setup.
  • Rapidly growing application range to meet new demands
  • Street or stip, track or trail - you can depend on Nitro.

Differential:  Dana Spicer 44 Standard Rotation
Ratio:   4.56 Thick
Carrier:  3.73 & down case
Tooth Count: 41-9
Manufacturer:  Nitro Gear & Axle
Warranty:  2 years
Pinion Spline Count: 26
Ring Gear Bolt Count: 10 (This ring gear has dual bolt pattern.  One consisting of 3/8" bolt holes and the other 7/16")

Vehicle Applications:

1948-1979 Ford F100 F150 Rearend
1967-1976 Ford F150 4x4 Front Differential
1967-1977 Ford F250 4x4 Front Differential
1972-1977 Ford Bronco
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 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

Shipping & Returns
When shipping denotes a $0 value, team will email you a freight quote, it does NOT mean freight is $0. You will receive a freight estimate ASAP which you can choose to accept (complete the purchase), or deny, (abandon purchase). Shipping will be calculated at checkout using the best available freight based on your location. Some large items and or oversized items can be purchased and the Double Black team will email you within 24 hours with a seperate freight invoice.
Downloads & Manuals