SKF SDK339-BMK Axle Differential Bearing and Seal Kit - Front or Rear

SKF Axle Differential Bearing and Seal Kit

SKF SDK339-BMK is an axle differential bearing and seal kit built for Dana 44 and Spicer 44 applications across Jeep, Ford, Dodge, Chevrolet, and GMC driveline service. It is designed for rear and front axle differential repair where precise bearing fit, sealing performance, and OE-style service coverage matter.

• SKF differential service kit for Dana 44 axle applications
• Premium bearings with matched cones and cups
• Seals built to SKF standards with Bore-Tite coating for improved sealing performance
• Form-fitting gaskets and silicone sealant included where applicable
• Designed for complete differential, transfer case, and transmission service coverage
• Part number: SDK339-BMK

Fitment and application details

This kit is used for differential bearing and seal service on vehicles such as Jeep Wrangler rear Dana 44 axle applications and Ford Bronco front Dana 44 axle applications. It also covers a wide range of Jeep, Ford, Dodge, Chevrolet, and GMC models with Dana 44 or Spicer 44 axle configurations, including Ford F-150 front applications with a 3.00" O.D. pinion cup and Ford F-250 front Spicer 44 axle service.

SKF builds these service kits with the components needed for a complete repair approach, helping reduce repeat teardown work caused by worn bearings or leaking seals. The SDK339-BMK part number is commonly searched for Dana 44 axle bearing and seal replacement on classic 4x4 trucks and SUVs, including Jeep CJ5, Jeep Cherokee, and Chevrolet K10 front axle service.

• Fits 1997-2000 Jeep TJ, rear, Master Kit; Dana 44 Axle
• Fits 1997-2000 Jeep Wrangler, rear, Master Kit; Dana 44 Axle
• Fits 1987-1995 Jeep Wrangler, rear, Master Kit; Dana 44 Axle
• Fits 1967-1996 Ford Bronco, front, Master Kit; Dana 44 Axle
• Fits 1977-1993 Dodge W150, front, Master Kit; Dana 44 Axle
• Fits 1975-1992 Ford F-150, front, Master Kit; Dana 44 Axle w/3.00" O.D. Pinion Cup
• Fits 1986-1992 Jeep Comanche, rear, Master Kit; Dana 44 Axle
• Fits 1984-1991 Jeep Grand Wagoneer, front, Master Kit; Dana 44 Axle
• Fits 1984-1991 Jeep Grand Wagoneer, rear, Master Kit; Dana 44 Axle
• Fits 1986-1989 Dodge W100, front, Master Kit; Dana 44 Axle
• Fits 1975-1977 Dodge W100, front, Master Kit; Dana 44 Axle
• Fits 1967-1988 Ford F-250, front, Master Kit; Spicer 44 Axle
• Fits 1977-1988 Jeep J10, front, Master Kit; Dana 44 Axle
• Fits 1974-1975 Jeep J10, front, Master Kit; Dana 44 Axle
• Fits 1974-1988 Jeep J20, front, Master Kit; Dana 44 Axle
• Fits 1987 Jeep Cherokee, rear, Master Kit; Dana 44 Axle
• Fits 1974-1985 Jeep Cherokee, rear, Master Kit; Dana 44 Axle
• Fits 1987 Jeep Wagoneer, rear, Master Kit; Dana 44 Axle
• Fits 1972-1985 Jeep Wagoneer, rear, Master Kit; Dana 44 Axle
• Fits 1986 Jeep CJ7, rear, Master Kit; Dana 44 Axle
• Fits 1981-1985 Ford F-350, front, Master Kit; Spicer 44 Axle
• Fits 1981-1984 Dodge W250, front, Master Kit; Dana 44 Axle
• Fits 1975-1983 Ford F-100, rear, Master Kit; Dana 44 Axle
• Fits 1967-1983 Ford F-100, front, Master Kit; Dana 44 Axle w/3.00" O.D. Pinion Cup
• Fits 1975-1980 Chevrolet K10, front, Master Kit; Dana 44 Axle
• Fits 1973-1980 Chevrolet K10 Suburban, front, Master Kit; Dana 44 Axle
• Fits 1975-1980 Dodge W200, front, Master Kit; Dana 44 Axle
• Fits 1979-1980 GMC K2500, front, Master Kit; Dana 44 Axle
• Fits 1979-1980 GMC K2500 Suburban, front, Master Kit; Dana 44 Axle
• Fits 1975-1979 Chevrolet K5 Blazer, front, Master Kit; Dana 44 Axle
• Fits 1970-1979 GMC Jimmy, front, Master Kit; Dana 44 Axle
• Fits 1966-1975 Jeep CJ5, rear, Master Kit; Dana 44 Axle
• Fits 1969-1974 Chevrolet Blazer, front, Master Kit; Dana 44 Axle
• Fits 1967-1972 Chevrolet C10 Suburban, rear, Master Kit; Dana 44 Axle
• Fits 1967-1972 Chevrolet K10 Suburban, rear, Master Kit; Dana 44 Axle

What this kit helps address

• Wheel-end or differential noise related to worn bearings
• Gear oil leaks from aged or damaged axle seals
• Repeat service caused by incomplete bearing and seal replacement
• Seal wear in Dana 44 axle assemblies used on Jeep Wrangler and Ford Bronco applications
• Service needs on classic 4x4 front and rear axle rebuilds

Installation notes and tips

Confirm axle type, position, and pinion cup dimensions before ordering. This kit is listed for front and rear Dana 44 or Spicer 44 applications, so match the vehicle’s axle configuration to the fitment notes. During installation, inspect the housing, races, and sealing surfaces for wear or damage, and replace any components that do not meet service limits.

Quality assurance

SKF manufactures these kits to meet or exceed original equipment specifications using high-quality bearings, seals, and applicable gaskets or sealant. The included seals use SKF’s Bore-Tite coating to improve sealing performance, and the bearing sets use matched cones and cups for consistent service fit. This part cross-references 17412X and 34027-1 for the same application.