Timken HA590157 Wheel Bearing and Hub Assembly - Front or Rear

Timken HA590157 Wheel Bearing and Hub Assembly Overview

The Timken HA590157 wheel bearing and hub assembly is engineered for reliable driveline performance in select GM vehicles. Designed specifically for driven axles, this component ensures precise fitment and durability for Buick Montana, Chevrolet Uplander, Pontiac Relay, and Saturn Terraza models.

• 33 spline quantity for secure axle engagement
• 3 flange bolt holes with a 115.00 mm (4.528 inch) bolt circle diameter
• 6 wheel studs for stable wheel mounting
• Wheel pilot diameters of 2.756 inches (70.00 mm) and brake pilot diameters of 2.776 inches (70.50 mm)
• Hub pilot diameters of 3.600 inches (91.45 mm) for accurate hub alignment
• Flange diameter of 146.00 mm (5.748 inches) with a flange offset of 1.654 inches (42.00 mm)
• Designed for driven axle applications

Detailed Product Description

The Timken HA590157 wheel bearing and hub assembly is a precision-engineered component tailored for the driveline and axle systems of Buick Montana, Chevrolet Uplander, Pontiac Relay, and Saturn Terraza vehicles. This assembly features a 33-spline axle interface, ensuring a secure connection to the drivetrain. The 3-bolt flange with a 115 mm bolt circle diameter provides a robust mounting surface, while the 6 wheel studs accommodate standard wheel configurations for these models.

Wheel pilot diameters of 2.756 inches (70.00 mm) and brake pilot diameters of 2.776 inches (70.50 mm) help maintain proper alignment of the wheel and brake components, reducing vibration and wear. The hub pilot diameter of 3.600 inches (91.45 mm) ensures precise hub centering on the axle shaft. Additionally, the flange diameter and offset are designed to match factory specifications, supporting proper wheel positioning and brake clearance.

Common Applications and Problem Resolution

• Replacement for worn or damaged wheel bearing and hub assemblies on Buick Montana, Chevrolet Uplander, Pontiac Relay, and Saturn Terraza
• Eliminates wheel vibration and noise caused by bearing wear
• Restores proper wheel alignment and brake rotor positioning
• Addresses issues with uneven tire wear due to hub misalignment
• Prevents axle spline damage by ensuring secure fitment

Installation Notes and Tips

• Verify vehicle compatibility with Buick Montana, Chevrolet Uplander, Pontiac Relay, or Saturn Terraza models before installation
• Ensure the axle splines and hub pilot surfaces are clean and free of debris
• Torque flange bolts and wheel studs to manufacturer specifications to avoid premature wear
• Inspect related components such as brake rotors and calipers during installation
• Use proper tools to avoid damage to the bearing assembly during installation

Quality Assurance and Warranty

Timken manufactures the HA590157 wheel bearing and hub assembly to meet or exceed OEM standards for durability and performance. Each unit undergoes rigorous quality control to ensure precise dimensions and reliable operation. This part is backed by Timken's limited warranty, covering defects in materials and workmanship under normal use conditions.