Timken HA590085 Wheel Bearing and Hub Assembly - Front

Timken HA590085 Wheel Bearing and Hub Assembly Overview

The Timken HA590085 wheel bearing and hub assembly is engineered for reliable driveline performance in select Buick, Chevrolet, and Pontiac models. Designed to meet precise specifications, this assembly ensures proper fitment and durability for vehicles such as the Buick LaCrosse and Chevrolet Malibu.

• 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)
• Flange diameter measuring 145.50 mm (5.728 inches) with a flange offset of 42.18 mm (1.661 inches)
• Hub pilot diameter of 91.42 mm (3.599 inches)
• Designed for driven axle applications

Detailed Product Description

The Timken HA590085 is a wheel bearing and hub assembly specifically designed for driven axles, providing a critical interface between the wheel and the vehicle’s drivetrain. Its 33 spline count ensures compatibility with the axle shaft, while the 5 wheel studs and 3 flange bolt holes provide secure mounting points for the wheel and brake components. The precise wheel pilot and brake pilot diameters help maintain proper alignment and reduce vibration, contributing to smoother vehicle operation. The flange diameter and offset are engineered to match factory specifications, ensuring proper fitment on compatible Buick, Chevrolet, and Pontiac models including the Allure, Aztek, Century, Grand Prix, Impala, LaCrosse, Malibu, Montana, Monte Carlo, Regal, and Rendezvous.

Common Applications and Problem Solving

• Replaces worn or damaged wheel bearing assemblies causing noise or rough rotation
• Addresses wheel hub looseness or excessive play affecting vehicle handling
• Resolves ABS sensor issues related to hub assembly wear
• Corrects wheel vibration or uneven tire wear due to hub misalignment
• Restores proper flange and pilot fitment for brake rotor stability

Installation Notes and Tips

• Ensure compatibility with vehicle make and model before installation
• Use proper torque specifications for flange bolts and wheel studs
• Inspect axle splines and clean mating surfaces prior to assembly
• Verify hub pilot and flange dimensions match OEM requirements
• Check for smooth rotation and absence of play after installation

Quality Assurance and Warranty

Timken wheel bearing and hub assemblies are manufactured to meet or exceed OEM standards for durability and performance. The HA590085 part number undergoes rigorous quality control to ensure precise fit and long service life. While specific warranty terms may vary, Timken typically offers coverage against defects in materials and workmanship, providing confidence in the reliability of this component for Buick, Chevrolet, and Pontiac vehicles.