8.8 Inch Ford Differential Ring And Pinion Set With 3.73 Gear Ratio For 10 Bolt 30 Spline Fits Explorer E 150 F 250 Mustang Ranger Thunderbird Lincoln Mazda Mercury 8620 Steel High Strength Beefed Up Upgrade
✔️ 3.73:1 gear ratio, 8620 steel, direct-fit, 30-spline pinion
The F8.8-373A Ring & Pinion Set is a single-ring-and-pinion upgrade for Ford 8.8 differential with 10-bolt housing and 30-spline pinions, replacing OEM parts for stronger torque and smoother operation across daily drivers and performance builds.
✅ Premium 8620 steel construction for high durability and heat resistance
✅ 3.73 gear ratio optimizes torque transfer and acceleration
✅ OE direct-fit replacement for easy, factory-like installation
✅ Compatible with Ford 8.8 differential 10-bolt housing, 30-spline pinion
✅ Replaces Richmond 49-0104-1 and EXCEL from Richmond F88373, Motive Gear F8.8-373
💡 What is a ring and pinion set used for in a Ford 8.8 differential? - Improves torque transfer and acceleration by selecting a proper gear ratio - Ensures precise gear mesh for quieter operation under load - Serves as a direct-fit upgrade for compatible 8.8 differential with 30-spline pinions