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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.
- 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)
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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
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