Timken 513121 Wheel Bearing and Hub Assembly - Front or Rear

Timken 513121 Wheel Bearing and Hub Assembly Overview

The Timken 513121 wheel bearing and hub assembly is engineered for reliable driveline performance in select Buick, Cadillac, Chevrolet, Oldsmobile, and Pontiac vehicles. Designed to meet precise specifications, this assembly ensures proper fitment and durability for models such as the Aurora, Bonneville, DeVille, Grand Prix, Impala, and more.

• 33 spline quantity for secure drivetrain engagement
• 3 flange bolt holes with a 115.00 mm (4.528 inch) bolt circle diameter
• 5 wheel studs for stable wheel mounting
• Wheel pilot diameter of 70.10 mm (2.760 inches) and brake pilot diameter of 70.60 mm (2.780 inches)
• Hub pilot diameter measuring 91.25 mm (3.593 inches)
• Flange diameter of 145.50 mm (5.728 inches) with a flange offset of 42.06 mm (1.656 inches)
• Designed for driven axle applications

Technical Details and Specifications

The Timken 513121 assembly features a 33-spline driven design, ensuring compatibility with the specified GM vehicle drivetrains. The flange includes three bolt holes arranged on a 115 mm bolt circle diameter, providing a secure connection to the vehicle hub. The five wheel studs accommodate standard wheel mounting configurations, while the wheel pilot diameter of 70.10 mm and brake pilot diameter of 70.60 mm ensure precise alignment of the wheel and brake components. The hub pilot diameter of 91.25 mm supports proper hub centering, contributing to smooth wheel rotation and reduced vibration. The flange diameter and offset are engineered to maintain correct wheel positioning relative to the suspension and brake system.

Compatible Vehicles and Applications

This wheel bearing and hub assembly is compatible with a range of Buick, Cadillac, Chevrolet, Oldsmobile, and Pontiac models, including but not limited to:

• Buick Century, LeSabre, Regal, and Park Avenue
• Cadillac DeVille, Eldorado, Seville, and DTS
• Chevrolet Impala, Monte Carlo, and Montana
• Oldsmobile 88 and 98
• Pontiac Grand Prix, Bonneville, and Aztek

Use the Timken 513121 for reliable replacement in these vehicles to maintain driveline integrity and wheel alignment.

Common Issues Addressed by This Assembly

• Eliminates wheel bearing noise and roughness
• Resolves wheel wobble and vibration issues
• Corrects uneven tire wear caused by hub misalignment
• Prevents premature brake rotor wear due to improper hub fit
• Restores proper wheel mounting and secure flange connection

Installation Notes and Tips

• Ensure vehicle compatibility by verifying make, model, and year before installation
• Use proper torque specifications for flange bolts and wheel studs to avoid damage
• Inspect related components such as axle shafts and brake rotors during installation
• Clean mounting surfaces thoroughly to ensure accurate fitment and prevent contamination
• Professional installation is recommended to maintain safety and performance standards

Quality Assurance and Warranty

Timken manufactures the 513121 wheel bearing and hub assembly to meet stringent quality standards, ensuring durability and reliable performance. While specific warranty details may vary, Timken products typically include coverage against defects in materials and workmanship. Refer to Timken’s official warranty policy for complete information.