Timken SP550203 Wheel Bearing and Hub Assembly - Rear

Timken SP550203 Wheel Bearing and Hub Assembly Overview

The Timken SP550203 wheel bearing and hub assembly is engineered for reliable driveline performance in Ford Expedition and Lincoln Navigator vehicles. Designed to meet precise specifications, this assembly ensures proper fitment and durability for your SUV's front or rear driven axle.

• 33 spline quantity for secure axle engagement
• 6 wheel studs for stable wheel mounting
• 4 flange bolt holes for robust attachment
• Flange diameter of 182.84 mm (7.198 inches) for accurate fit
• Bolt circle diameter of 134.76 mm (5.306 inches) matching OEM standards
• Wheel pilot diameters of 87.03 mm and 3.426 inches for precise wheel alignment
• Brake pilot diameters of 90.01 mm and 3.544 inches to support brake component positioning
• Hub pilot diameters of 99.35 mm and 3.911 inches for proper hub centering
• Flange offset measurements of 55.75 mm and 2.195 inches to maintain correct wheel positioning
• Designed for driven axle applications

Detailed Product Description

The Timken SP550203 wheel bearing and hub assembly is specifically designed for the driveline and axle systems of Ford Expedition and Lincoln Navigator models. This assembly features a 33-spline interface that ensures a secure connection to the axle shaft, supporting torque transfer and vehicle stability. The 6-wheel stud configuration and 4 flange bolt holes provide a strong mounting platform for wheels, while the flange diameter and bolt circle diameter conform to factory specifications for seamless installation.

Wheel pilot diameters of 87.03 mm and 3.426 inches, along with brake pilot diameters of 90.01 mm and 3.544 inches, ensure proper alignment of wheels and brake components, reducing vibration and wear. The hub pilot diameters of 99.35 mm and 3.911 inches center the hub accurately on the axle, contributing to smooth rotation and extended bearing life. Flange offset values of 55.75 mm and 2.195 inches maintain correct wheel positioning relative to the suspension and steering geometry.

Common Applications and Problem Resolution

• Replacement for worn or damaged wheel bearing and hub assemblies on Ford Expedition and Lincoln Navigator
• Eliminates wheel vibration and noise caused by bearing wear
• Resolves uneven tire wear due to improper hub alignment
• Addresses ABS sensor issues related to faulty hub assemblies (if applicable)
• Restores proper wheel mounting and brake component alignment

Installation Notes and Tips

• Verify compatibility with your specific Ford Expedition or Lincoln Navigator model year before installation
• Use proper torque specifications for flange bolts and wheel studs to ensure secure fitment
• Inspect axle splines and mating surfaces for damage prior to assembly
• Clean mounting surfaces thoroughly to prevent contamination and premature wear
• Consider professional installation if unfamiliar with driveline components

Quality Assurance and Warranty

Timken manufactures the SP550203 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. While specific warranty terms may vary, Timken typically offers coverage against defects in materials and workmanship, providing confidence in the product's longevity and function.