Nitro Gear & Axle Differential Ring and Pinion
Representative Photo, actual item may vary
Nitro Gear & Axle D44RS-456-NG Dana 44 Ring and Pinion Gear Set 4.56 Ratio
Nitro Gear & Axle D44RS-538-NG Dana 44 Ring and Pinion Gear Set 5.38 Ratio Reverse Rotation
Nitro Gear & Axle Ring and Pinion: Engineered for Strength and Silence
When it comes to regearing a 4x4, Jeep, or performance truck, few names carry as much weight as Nitro Gear & Axle. Their differential ring and pinion gear sets are purpose-built for drivers who demand precision on the street and durability when the pavement ends. Rather than simply sourcing off-the-shelf forgings, Nitro controls the manufacturing process from raw material selection through final inspection — a commitment that shows in both performance and longevity.
Premium Materials and Manufacturing Process
Every Nitro Gear & Axle ring and pinion set starts with high-quality steel. 8620 and 9310 steel gear forgings form the foundation of each set, chosen for their excellent balance of surface hardness and core toughness. From there, the process includes fully automated turning, a single-pass cut, CNC precision machining, and vacuum heat treating. After machining, each gear undergoes computer-controlled triple lapping — a step that ensures precise tooth contact patterns, reduces noise, and makes installation dramatically easier. Every finished set is then Rockwell-tested for hardness to verify it meets Nitro's exacting standards before it ever leaves the facility.
What truly sets Nitro apart is their quality assurance step: each new product is actually installed and set up by Nitro's own in-house differential experts to confirm excellent fitment and ease of setup — not just inspected on a bench.
Wide Coverage: Trucks, Jeeps, and 4WD Applications
Nitro Gear & Axle covers a broad range of popular differentials, including Dana 30, Dana 44, Dana 60, Dana Super 60, Ford 8.8-inch, Ford 9.75-inch, GM 55P, Toyota 8-inch, Toyota 8.2-inch, Toyota 8.75-inch, and more. Gear ratio options span from numerically low highway ratios all the way to steep off-road crawl ratios, making it straightforward to find the right set for lifted trucks running oversized tires, tow rigs needing more pulling torque, or performance vehicles looking for better acceleration.
Notably, Nitro was the first in the industry to offer complete, single-part-number front and rear ring and pinion gear sets — a major convenience for 4WD owners who must match front and rear ratios during a regear. This innovation eliminates the guesswork of sourcing matched sets from different SKUs and simplifies ordering for shops and enthusiasts alike.
A 2-Year Warranty and Broad Application Support
Nitro Gear & Axle backs their ring and pinion sets with a 2-year warranty covering defects in materials and workmanship from the date of purchase. Whether you are building a daily-driven 4x4, a dedicated trail rig, or a street performance car, that coverage reflects Nitro's confidence in the quality of their manufacturing process. Their catalog continues to grow with new ratios and applications added regularly to keep pace with the latest truck and SUV platforms.
Explore all available gear sets in the Differential Ring and Pinion category, or browse the complete Nitro Gear & Axle product lineup to find axle shafts, install kits, spools, and traction devices that pair perfectly with your new ring and pinion.