Nitro Ford 10.5 - 4.88 Ring & Pinion '10 & Older

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. Differential: Ford 10.5" Gear Ratio: 4.88 Pinion Splines: 31 Ring Gear Bolts: 12 (not included) Manufacturer: Nitro Gear & Axle