The Eaton Detroit Locker differential, part number 225S12C or 225S-12C, is a locking differential designed for Dana 60 rear axles with a 9.75 in. ring gear and 16-spline axle shafts (1.31 in. diameter). It fits gear ratios of 4.10 and numerically lower, covering Ford one-ton trucks, vans, wagons, and cab-and-chassis vehicles through model year 1974. Applications span street and strip use, rock crawling, towing, sand sports, drag racing, and circle track. The Detroit Locker's automatic locking action delivers full-axle torque on demand without driver input. Available from Pro Gear and Transmission. Call us to confirm proper fit for your specific axle build.
Features
Locking differential for Dana 60 rear axle
9.75 in. ring gear diameter
16-spline axle shafts, 1.31 in. shaft diameter
Fits gear ratios of 4.10 and numerically lower
Suited for Ford one-ton trucks, vans, wagons, and cab and chassis through 1974
Verified for rock crawl, towing, drag racing, circle track, and street use
Tech Specs
- Differential Type: Locking
- Axle: Dana 60 Rear
- Ring Gear Size: 9.75 in.
- Gear Ratio: 4.10 and down
- Axle Shaft Spline Count: 16
- Axle Shaft Diameter: 1.31 in.
- Vehicle Make: Ford
- Vehicle Type: One-Ton Truck, Van, Wagon, Cab and Chassis
- Model Year: Through 1974
- Usage: Off-Road and On-Road (towing, rock crawl, drag racing, circle track, street, trail, sand sports, restoration)
