Eaton 225SL29A Detroit Locker Differential (Dana 60, 35 Spline, 4.56 And Higher Gear Ratio) | 1979-2016 Ford F250/F350 Super Duty 4WD

Features:

• Fits Dana 60 with 35 spline axles
• Built for 4.56 and higher gear ratios
• Compatible with 1.5 inch axle shafts
• Heavy duty build for extreme conditions
• Automatically locks for maximum traction
• Ideal for off-road and towing use
• Proven design with over 60 years of use
• Works in front or rear axle positions
• Perfect upgrade for larger tires
• 9.75 inch ring gear compatible
• Fits 1979–2016 Ford F250 and F350 4WD
• OE lockers may require custom modifications

Lock In Traction Where It Matters Most

If you've upgraded your Super Duty with bigger tires or plan to take it off-road, the Eaton 225SL29A Detroit Locker is a must-have addition. Built for serious traction, this automatic locker ensures both wheels stay powered when the terrain turns unpredictable. Whether you're crawling through rocks, hammering down muddy trails, or just need all the grip you can get under load, this unit delivers the kind of confident control your open differential just can't match. It's especially well-suited for trucks running aggressive gear ratios of 4.56 and higher, giving you an edge when you need torque to hit the ground evenly. The design is brutally simple and proven to work in harsh conditions without complicated electronics or clutch packs to fail. Installation brings immediate results, more bite, more control, and a drivetrain that finally keeps up with your build. For anyone who's serious about capability, this is the traction upgrade that never backs down.

Built For Dana 60 Axles With High Gear Ratios

The Eaton 225SL29A Detroit Locker is engineered specifically for Dana 60 axles with 35-spline shafts, a 1.5 inch axle diameter, and gear ratios of 4.56 or numerically higher. It uses a fully automatic mechanical locking mechanism that engages both axle shafts under load, providing 100 percent torque to both wheels whenever traction is needed. This unit is built to handle the demands of high-torque applications, oversized tires, and aggressive gearing without compromising durability. Eaton's time-tested design features heavy duty internal components that are ideal for both front and rear axles in 4WD setups. It fits a 9.75 inch ring gear and is compatible with 1979–2016 Ford F250 and F350 Super Duty models equipped with the correct Dana 60 axle. For vehicles originally equipped with an OE locker, some custom modifications may be required to ensure proper fitment. With over 60 years of proven field use, the Detroit Locker remains one of the most trusted differentials in performance and utility environments.

Fits: 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 Ford F250/F350 Super Duty 4WD

Notes:

• Only fits Dana 60 axles with 35 splines
• Requires 4.56 or higher gear ratio
• Compatible with 1.5 inch axle shaft diameter
• Designed for 9.75 inch ring gear applications
• Works in both front and rear axle positions
• Built for 1979–2016 Ford F250 and F350 4WD
• Ideal for trucks with larger wheels and tires
• OE locker-equipped vehicles may need modifications
• Not compatible with other axle models or gear ranges
• Automatic full-locking design for maximum traction
• Heavy duty construction for extreme use conditions
• Proven Eaton design with over 60 years of success