SKF SDK312-MK Axle Differential Bearing and Seal Kit - Rear

Axle Differential Bearing and Seal Kit for Ford Rear Ends

SKF SDK312-MK is an axle differential bearing and seal kit for rear differential service on select Ford and Mercury applications. It is built around an 11.0000 inside diameter, 2.500 width, and DIFF2TP bearing type for a precise service fit on the listed rear axle assemblies.

Fits 1957-1970 Ford Thunderbird, rear; Fits 1960-1970 Ford F-100, rear; Fits 1965-1970 Ford Mustang, rear; Fits 1967-1970 Ford Bronco, rear; Fits 1967-1970 Mercury Cougar, rear; Fits 1968-1970 Mercury Montego, rear; Fits 1969-1970 Ford F-250, rear.

Key Features

• SKF axle differential bearing and seal kit for rear differential service
• 11.0000 inside diameter and 2.500 width
• DIFF2TP bearing type
• Bearings include matching cones and cups for proper bearing service
• Seals use SKF Bore-Tite coating to improve sealing performance
• Form-fitting gaskets and silicone sealant are provided where applicable
• Built for Ford and Mercury rear axle applications listed below

Detailed Description

SKF SDK312-MK is a service kit for rear differential repair on classic Ford and Mercury driveline applications. It is engineered for the rear axle assemblies used in the Ford Bronco, F-100, F-250, Mustang, Thunderbird, and Mercury Cougar and Montego listed in the fitment data. The kit combines bearings and seals specified to meet or exceed original equipment requirements, helping restore differential serviceability with components matched for the application.

This part cross-references Global Parts Distributors LLC 9423399 for the same application. The SKF SDK312-MK part number is also referenced in interchange listings for related service applications.

What This Kit Helps Address

• Rear differential bearing noise or rough operation
• Oil seepage at differential seals
• Wear-related service issues in the axle assembly
• Leak paths at gasket or seal interfaces where applicable
• Incomplete differential service caused by replacing only one wear component

Installation Notes and Tips

Verify axle ratio, ring gear configuration, and spline details against the vehicle before installation. This kit is listed for rear applications only and is tied to specific Ford 9.00 inch 28-spline setups through 5/10/70 ring gear configurations where noted. Clean all sealing surfaces thoroughly, inspect the housing for wear, and follow factory service procedures for bearing preload and seal placement during reassembly.

Quality Assurance

SKF manufactures these differential service components to high quality standards, with bearings, seals, and applicable gaskets selected for complete repair coverage. The seals feature SKF Bore-Tite coating, and the bearing components are supplied with matching cones and cups for consistent service fit.