Eaton 225SL29B Detroit Locker Differential (Dana 60, 35 Spline, 4.10 And Lower Gear Ratio) | 1979-2016 Ford F250/F350 Super Duty 4WD

Features:

• Maximizes traction for off-road and towing
• Engineered for Dana 60 with 35 splines
• Fits 4.10 and lower gear ratios only
• Compatible with 1.5 inch axle shafts
• Heavy duty design built to last
• Legendary durability with 60-year track record
• Works with front or rear axles
• Ideal upgrade for oversized tires
• Automatically locks for full power transfer
• 9.75 inch ring gear compatible
• Perfect fit for 1979–2016 F250 and F350 4WD
• Trusted Eaton performance and build quality

Dominate Any Terrain With Maximum Locking Traction

If your Ford Super Duty has been upgraded with larger wheels and tires, it’s time to match that traction potential with a differential that can keep up. The Eaton 225SL29B Detroit Locker is built for serious off-roaders, weekend haulers, and anyone who demands full power to both wheels when the terrain gets unpredictable. Whether you’re crawling through mud, climbing rock, or pulling a loaded trailer uphill, this locker ensures both wheels stay locked and moving. No hesitation, no spinouts, just consistent grip exactly when you need it. It’s a proven upgrade that’s been trusted in performance applications for over 60 years. Built to handle extreme torque and rugged use, it delivers bulletproof reliability with a simple, automatic locking design. If you want your F250 or F350 to respond like a true 4x4 should, this is the kind of hardware that delivers real results.

Proven Strength Built For Dana 60 Performance

The Eaton Detroit Locker 225SL29B is engineered for Dana 60 axles with 35-spline shafts, a 1.5-inch axle diameter, and gear ratios of 4.10 or lower. It’s a fully automatic locking differential that responds instantly when traction is lost, sending 100 percent of power to both wheels under load. Unlike limited-slip options, this locker provides true, full lock when needed, ideal for technical terrain or tough work conditions. It features a durable 9.75-inch ring gear fitment and is compatible with both front and rear axle configurations, as long as the axle matches the required specs. The design has been battle-tested for over six decades, making it one of the most reliable locking solutions on the market. Eaton’s heavy duty construction holds up to the demands of lifted trucks, oversized tires, and aggressive off-road driving. This unit fits 1979–2016 Ford F250 and F350 4WD models equipped with the correct Dana 60 axle configuration.

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 spline shafts
• Compatible with 1.5 inch axle shaft diameter
• Designed for gear ratios of 4.10 and lower
• Works in both front and rear axle positions
• Not compatible with Dana 70 or other axle types
• Ring gear size must be 9.75 inches
• Best suited for trucks with oversized tires or heavy use
• Delivers automatic full lock when traction is lost
• Well-proven design with over 60 years of use
• Ideal for off-road, towing, and rugged applications
• Fits 1979–2016 Ford F250 and F350 4WD models
• Professional installation recommended for proper setup