Yukon Ford 10.25" Ring & Pinion - Long Pinion, 31-Spline
YUKYG F10.25-373L
The Yukon Ring & Pinion Gear Set for Ford 10.25" Long Pinion Axles is engineered to restore performance, towing capability, and off-road drivability in 1993–1999 Ford 10.25" rear axles. Precision manufactured from high-quality forged steel, Yukon gear sets deliver exceptional strength, quiet operation, and long service life in heavy-duty work trucks, tow rigs, and off-road builds.
Changing differential gear ratios is one of the most effective ways to recover lost performance after installing larger tires or to tailor your truck for towing, crawling, or highway driving. Designed specifically for the long pinion Ford 10.25" axle, these gears must be installed using proper setup procedures to achieve correct pinion depth, backlash, and bearing preload.
Includes:
- (1) Ring Gear
- (1) Long Pinion Gear
- Available Gear Ratios: 3.73, 4.11, 4.30, 4.56 & 5.38
Note: Sold as a matched ring and pinion gear set. Master install kit, bearings, races, seals, shims, crush sleeve, and carrier components are sold separately unless otherwise noted.
Specifications
| Specification | Details |
|---|---|
| Manufacturer | Yukon Gear & Axle |
| Application | Ford 10.25" Rear Axle |
| Model Years | 1993–1999 |
| Pinion Style | Long Pinion |
| Ring Gear Diameter | 10.25" |
| Pinion Spline Count | 31 Spline |
| Ring Gear Bolt Count | 12 Bolts |
| Differential Cover Bolts | 12 Bolts |
| Available Ratios | 3.73, 4.11, 4.30, 4.56 & 5.38 |
| Sold As | Matched Ring & Pinion Gear Set |
Fitment
Fits Ford 10.25" Long Pinion Rear Axles Found In:
- Ford E-250 Econoline (1985–1998)
- Ford E-350 Econoline (1985–1998)
- Ford F-150 (2000–2004)
- Ford F-250 (1985–1998)
- Ford F-250 Super Duty (1999)
- Ford F-350 (1985–1997)
- Ford F-350 Super Duty (1999)
Installation Notes:
- Fits Ford 10.25" rear axle applications with the long pinion design.
- Not compatible with Ford 10.5" Sterling axles or earlier Ford 10.25" axle variations outside the listed applications.
- Professional gear setup is strongly recommended.
- A Yukon Master Overhaul Kit is recommended during installation.
- Verify axle tag, pinion style, spline count, and existing gear ratio before ordering.
FAQ
Why re-gear a Ford 10.25" axle?
Installing larger tires effectively raises your overall gear ratio, reducing acceleration, towing performance, and low-speed torque. Re-gearing your Ford 10.25" axle restores engine RPM to a more efficient operating range, improving drivability, towing capability, and off-road performance.
Which gear ratio should I choose?
Gear ratios such as 4.11 and 4.30 offer an excellent balance between highway cruising and towing performance, while deeper ratios like 4.56 and 5.38 are better suited for oversized tires, rock crawling, and heavy-duty off-road use where maximum torque multiplication is needed.
Why is proper gear setup important?
Ring and pinion gears require precise adjustment of pinion depth, backlash, and bearing preload. Improper setup can lead to excessive gear noise, overheating, premature bearing wear, and gear failure. Installing new bearings, races, seals, crush sleeves, and setup components during installation helps ensure long service life and reliable performance.
What makes the Ford 10.25" axle popular?
The Ford 10.25" axle has earned a reputation for exceptional strength and durability in heavy-duty trucks. Its large ring gear, robust housing, and extensive aftermarket support make it an excellent choice for towing, commercial use, diesel-powered trucks, and serious off-road builds.