SKF 15704 Differential Pinion Seal - Rear

SKF Rear Differential Pinion Seal

The SKF 15704 rear differential pinion seal is built for rear axle sealing where gear oil retention and contamination control matter. It is a direct-fit style seal for select Mazda MX-5, Mazda Miata, and Honda S2000 rear differential applications, with dimensions and sealing materials specified for the shaft and housing interface.

SKF has a long history in shaft seal engineering, and this rear axle seal reflects that focus with premium materials and application-specific design. If you are servicing a rear differential on a Mazda MX-5 Miata or Honda S2000, SKF 15704 provides a precise sealing solution for the pinion area.

Key Features

• Part number: 15704
• Brand: SKF
• Product type: Differential Pinion Seal
• Brand line: Differential Pinion Seal - Rear - Rear Axle
• Sealing surface type: Polyacrylate
• Outside diameter: 2.523 in
• Shaft diameter: 1.575 in
• Width: 0.394 in
• Rear axle sealing application

Product Details

SKF designs seals to specific application requirements using premium materials selected for the operating environment. This rear differential pinion seal is intended to keep lubricant inside the rear axle assembly while helping block dirt, moisture, and other contaminants from entering the differential. It is a practical replacement for rear pinion seal service on 2000-2009 Honda S2000, 1994-1997 Mazda Miata, 1999-2005 Mazda Miata, 2006-2014 Mazda MX-5, and 2006-2024 Mazda MX-5 Miata rear applications. This part cross-references Honda and Mazda OE numbers 91201PCZ003 and MA0227165A for the same application.

Common Repair Uses

• Rear differential gear oil seepage at the pinion area
• Contamination entering the rear axle through a worn seal
• Service replacement during differential noise or leak diagnosis
• Maintenance on Mazda MX-5 Miata and Honda S2000 rear driveline assemblies
• Restoring proper sealing after pinion-area wear

Installation Notes

Inspect the pinion shaft sealing surface before installation and verify the shaft diameter matches the seal specification. For some Mazda MX-5 applications, the fitment notes call out Speedi-Sleeve # 99157, so confirm the shaft surface condition and related service parts before assembly. Clean the housing bore and surrounding area thoroughly, and follow factory service procedures for pinion seal replacement and differential setup.

Quality Assurance

SKF has been developing shaft seals since 1928 and manufactures sealing products to high quality standards for long service life and safety. The 15704 is engineered with application-specific dimensions and materials to support reliable rear axle sealing performance.