National 712146 Wheel Seal - Rear

National 712146 Wheel Seal Overview

National 712146 is a wheel seal built for rear axle service on select Buick, Chevrolet, Oldsmobile, and Pontiac vehicles. It uses a nitrile sealing material and a bi-directional lip design to help maintain a consistent seal at the shaft and housing bore.

With dimensions of 1.687 in. inside diameter, 2.579 in. outside diameter, and 0.470 in. width, this seal is specified for applications that require a precise OE-style fit. National 712146 is also referenced by Bosch 16735 and Centric Parts 417.62014 for the same application.

Key Features

• Wheel seal / oil seal for rear axle service
• National part number 712146
• Nitrile sealing material for durable sealing performance
• Bi-directional lip design
• 1.687 in. shaft diameter and 2.560 in. housing bore
• 2.579 in. outside diameter and 0.470 in. width
• Fits Buick-Oldsmobile axle applications with 8.5 in. ring gear on listed vehicles

Detailed Description

National 712146 is engineered for rear wheel seal replacement on classic GM platforms, including Buick LeSabre, Chevrolet Caprice, Chevrolet El Camino, Chevrolet Impala, Oldsmobile 98, Oldsmobile Delta 88, Pontiac Bonneville, Pontiac Catalina, Pontiac Laurentian, Pontiac Parisienne, Buick Riviera, Buick Century, Buick Regal, Chevrolet Malibu, Chevrolet Monte Carlo, Oldsmobile Cutlass, Oldsmobile Cutlass Salon, Oldsmobile Cutlass Supreme, Pontiac Grand LeMans, Pontiac LeMans, and Pontiac Grand Am. It fits the listed rear applications with 8.5 in. ring gear and Buick-Oldsmobile axle configurations where noted.

National has supplied sealing solutions for more than 75 years, and this 712146 seal reflects that focus on dimensional accuracy and application-specific fitment. The part is identified as an oil seal in the 712000 series and is sized in inches for straightforward matching during axle and wheel seal replacement work.

What This Seal Helps Address

• Rear axle fluid leakage at the wheel seal area
• Contamination entering the axle housing through a worn seal
• Noise or wear associated with a deteriorated sealing surface
• Seal replacement needs during rear axle service on GM A-body and full-size applications
• Fitment issues when replacing an OE-style seal on listed Buick, Chevrolet, Oldsmobile, and Pontiac models

Installation Notes and Tips

Verify shaft diameter, housing bore, and seal width before installation. Clean the axle housing and sealing surface thoroughly, and inspect the shaft for grooves or wear that could affect sealing performance. Confirm rear axle configuration, ring gear size, and vehicle application against the fitment notes before ordering or installing National 712146.

• Fits 1977-1979 Buick LeSabre, rear, with 8.5 (in) Ring Gear; with Buick-Oldsmobile Axle
• Fits 1977-1979 Chevrolet Caprice, rear, with 8.5 (in) Ring Gear; with Buick-Oldsmobile Axle
• Fits 1977-1979 Chevrolet El Camino, rear, with 8.5 (in) Ring Gear; with Buick-Oldsmobile Axle
• Fits 1977-1979 Chevrolet Impala, rear, with 8.5 (in) Ring Gear; with Buick-Oldsmobile Axle
• Fits 1977-1979 Oldsmobile 98, rear, with 8.5 (in) Ring Gear; with Buick-Oldsmobile Axle
• Fits 1977-1979 Oldsmobile Delta 88, rear, with 8.5 (in) Ring Gear; with Buick-Oldsmobile Axle
• Fits 1977-1979 Pontiac Bonneville, rear, with 8.5 (in) Ring Gear; with Buick-Oldsmobile Axle
• Fits 1977-1979 Pontiac Catalina, rear, with 8.5 (in) Ring Gear; with Buick-Oldsmobile Axle
• Fits 1977-1979 Pontiac Laurentian, rear, with 8.5 (in) Ring Gear; with Buick-Oldsmobile Axle
• Fits 1977-1979 Pontiac Parisienne, rear, with 8.5 (in) Ring Gear; with Buick-Oldsmobile Axle
• Fits 1977-1978 Buick Riviera, rear, with 8.5 (in) Ring Gear; with Buick-Oldsmobile Axle
• Fits 1973-1977 Buick Century, rear, with 8.5 (in) Ring Gear; with Buick-Oldsmobile Axle
• Fits 1973-1977 Buick Regal, rear, with 8.5 (in) Ring Gear; with Buick-Oldsmobile Axle
• Fits 1973-1977 Chevrolet Malibu, rear, with 8.5 (in) Ring Gear; with Buick-Oldsmobile Axle
• Fits 1973-1977 Chevrolet Monte Carlo, rear, with 8.5 (in) Ring Gear; with Buick-Oldsmobile Axle
• Fits 1975-1977 Oldsmobile Cutlass, rear, with 8.5 (in) Ring Gear; with Buick-Oldsmobile Axle
• Fits 1975-1977 Oldsmobile Cutlass Salon, rear, with 8.5 (in) Ring Gear; with Buick-Oldsmobile Axle
• Fits 1975-1977 Oldsmobile Cutlass Supreme, rear, with 8.5 (in) Ring Gear; with Buick-Oldsmobile Axle
• Fits 1975-1977 Pontiac Grand LeMans, rear, with 8.5 (in) Ring Gear; with Buick-Oldsmobile Axle
• Fits 1973-1977 Pontiac LeMans, rear, with 8.5 (in) Ring Gear; with Buick-Oldsmobile Axle
• Fits 1973-1975 Pontiac Grand Am, rear, with 8.5 (in) Ring Gear; with Buick-Oldsmobile Axle
• Fits 1973-1974 Oldsmobile Cutlass, rear
• Fits 1973-1974 Oldsmobile Cutlass Supreme, rear

Quality Assurance

National is a long-established sealing brand with more than 75 years in the industry, and the 712146 wheel seal is built around application-specific dimensions and material selection for rear axle service.