Timken SP550218 Wheel Bearing and Hub Assembly - Rear

Timken Wheel Bearing and Hub Assembly Overview

The Timken SP550218 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 driven axle system.

• 33 spline quantity for secure axle engagement
• 4 flange bolt holes with a 135.21 mm (5.323 inch) bolt circle diameter
• 6 wheel studs for stable wheel mounting
• Wheel pilot diameter of 86.98 mm (3.424 inches) and brake pilot diameter of 89.98 mm (3.543 inches)
• Flange diameter of 182.83 mm (7.198 inches) with a flange offset of 55.56 mm (2.187 inches)
• Hub pilot diameter measuring 99.35 mm (3.911 inches)
• Designed for driven axle applications

Technical Details and Specifications

The Timken SP550218 assembly is built to exacting standards to ensure compatibility with Ford Expedition and Lincoln Navigator models. The 33 spline count provides a precise fit on the axle shaft, while the 4-bolt flange with a 135.21 mm bolt circle diameter secures the hub firmly to the vehicle. The 6 wheel studs accommodate standard wheel mounting configurations, and the wheel pilot diameter of 86.98 mm ensures proper centering of the wheel. Brake pilot diameters of 89.98 mm allow for correct brake rotor alignment. The flange offset of 55.56 mm maintains proper positioning relative to the suspension and brake components, contributing to consistent handling and braking performance.

Compatible Vehicles and Applications

• Ford Expedition wheel bearing and hub replacement
• Lincoln Navigator driveline hub assembly upgrade
• Driven axle hub assembly for Ford and Lincoln SUVs
• Replacement for worn or damaged wheel bearing and hub components
• Restores proper wheel alignment and reduces vibration issues

Installation Notes and Tips

When installing the Timken SP550218 wheel bearing and hub assembly, ensure the axle splines align correctly with the 33 spline count on the hub. Torque flange bolts to manufacturer specifications to maintain secure mounting. Verify that the wheel pilot and brake pilot diameters match the vehicle’s rotor and wheel hub to avoid misalignment. It is recommended to inspect related components such as axle shafts and brake rotors during installation to ensure optimal performance.

Quality Assurance and Warranty

Timken manufactures the SP550218 wheel bearing and hub assembly to meet OEM standards for durability and fitment. This part undergoes rigorous quality control to ensure reliable operation in Ford Expedition and Lincoln Navigator vehicles. While specific warranty details may vary, Timken typically offers coverage against defects in materials and workmanship, providing confidence in the product’s longevity and performance.