SKF BR3994 Axle Differential Bearing - Rear, Rear Inner, Rear Left or Rear Right

SKF BR3994 Axle Differential Bearing

SKF BR3994 is a tapered roller axle differential bearing built for rear inner use in Ford full-floating axle applications. With a 2.625-inch inside diameter and 1.183-inch width, it is sized for precise differential support and smooth bearing operation in the axle assembly.

Key Features

• 2.625-inch inside diameter for the specified axle fitment
• 1.183-inch width for correct bearing spacing and support
• Tapered roller design for load handling in differential service
• Logarithmic roller raceway profile for smoother rolling contact
• Ultra-smooth surface finish for quiet operation
• SKF engineering and manufacturing standards for long service life

Detailed Description

This SKF axle differential bearing, part number BR3994, is made for rear inner positions in Ford F-250 and Ford F-350 full-floating axle setups. It is listed for 1985-1993 Ford F-250 rear inner applications with a Ford full-floating axle and 10.25-inch ring gear, as well as 1985-1993 Ford F-350 rear inner applications with a Ford full-floating axle. It also fits 1994 Ford F-250 rear inner with Ford full-floating axle and 10.25-inch ring gear through 4/94, plus 1994 Ford F-350 rear inner through 4/94. This part cross-references 1228P640 and 1458BR3994 for the same application.

Common Repair Uses

• Rear differential bearing noise in Ford F-250 and Ford F-350 trucks
• Excessive play or roughness in the rear inner axle bearing area
• Wear from high-mileage full-floating axle service
• Restoration of proper differential support in the axle assembly
• Replacement of a worn tapered roller bearing during axle rebuilds

Installation Notes and Tips

Verify the rear inner position, axle type, and ring gear specification before installation. Confirm the bearing dimensions match the original component and inspect related axle surfaces, seals, and races during service. Proper bearing setup and preload are important for quiet operation and long life.

Quality Assurance

SKF has more than 100 years of engineering experience in bearings and related components. BR3994 is manufactured to high quality standards for dependable fit, smooth operation, and durable service in the specified Ford axle applications.