National 9049N Wheel Seal - Rear Inner

National 9049N Wheel Seal Overview

National 9049N is a wheel seal/oil seal built for rear inner axle sealing on select Cadillac Eldorado and Oldsmobile Toronado applications. It uses nitrile material and precise dimensional sizing to help maintain a secure seal at the housing bore and shaft interface.

With a 1.880 in. shaft diameter, 2.566 in. outside diameter, and 0.250 in. width, this seal is specified for vehicles that require accurate fitment and dependable sealing performance. National 9049N is a direct-fit option for rear inner service on the listed applications.

Key Features

• Part number: 9049N
• Wheel seal / oil seal for driveline and axle sealing service
• Nitrile sealing material for common axle and wheel-end applications
• Inside diameter: 1.880 in. (47.750 mm)
• Outside diameter: 2.566 in. (65.180 mm)
• Housing bore: 2.562 in. (65.070 mm)
• Width: 0.250 in. (6.350 mm)
• Series: 9000, Type 25

Detailed Description

National 9049N is engineered as a rear inner wheel seal for 1967-1978 Cadillac Eldorado and 1966-1974 Oldsmobile Toronado applications. The seal dimensions are matched to the shaft and housing bore requirements, helping support proper sealing at the wheel end where lubricant retention and contamination control are critical. This part cross-references Gates 18990 for the same application.

National has supplied sealing products for decades, and this seal reflects that focus with a nitrile construction and application-specific sizing. For buyers searching for a 1967-1978 Cadillac Eldorado rear inner wheel seal or a 1966-1974 Oldsmobile Toronado rear inner oil seal, National 9049N provides the listed fitment and dimensional match.

What It Helps Address

• Gear oil seepage at the rear inner wheel end
• Contamination entering the axle or hub area
• Seal wear from age, heat, and mileage
• Loss of sealing integrity at the housing bore
• Service replacement for worn Cadillac Eldorado and Oldsmobile Toronado rear inner seals

Installation Notes and Tips

Verify shaft diameter, housing bore, and seal width before installation to confirm the seal matches the axle assembly. Inspect the sealing surface for grooves, corrosion, or damage, and clean the bore thoroughly before pressing the seal into place. Use proper installation tools to avoid distorting the nitrile lip or damaging the seal case.

For fitment-specific searches, this National 9049N wheel seal is listed for 1967-1978 Cadillac Eldorado, rear inner, and 1966-1974 Oldsmobile Toronado, rear inner.

Quality Assurance

National states that its sealing products are backed by more than 75 years of sealing expertise and ongoing design development for modern vehicle service needs. The 9049N is part of the 9000 series and is built to the published dimensional specifications for the listed applications.