Product Function Description

The front axle hub sub-assembly (part number 43502-69087) is a critical component of your Toyota Land Cruiser’s front wheel and braking system. Its primary function is to provide the rotating mounting surface for the front wheel, carrying the vehicle’s weight through the wheel bearings while allowing smooth rotation. The hub also serves as the mounting point for the brake rotor and wheel, and on non-ABS applications, it supports the wheel bearing assembly that enables precise wheel rotation and stable braking performance.

Common Symptoms of a Failing Front Axle Hub

If you are experiencing any of the following symptoms, your front axle hub may be failing and in need of replacement:

• Vibration or shimmy from the front wheel area: Steering wheel or floor vibration that changes with vehicle speed – this indicates worn or loose wheel bearings or a damaged hub surface

• Grinding or rumbling noise from the front end: A continuous grinding or rumbling sound that increases with speed – this suggests bearing wear or hub race damage

• Wheel bearing preload that will not hold: The bearing adjustment cannot be maintained, and preload wanders – this indicates the bearing race is spinning on a worn hub surface

• Uneven or irregular front tire wear: Front tires show cupping or scalloping – this can result from hub runout or bearing looseness

• Visible damage or heat discoloration on the hub: Inspection reveals cracks, deep scoring, or blue heat marks on the hub bearing surface

• Loose wheel bearings even when properly adjusted: The wheel has play that cannot be eliminated by bearing adjustment – this suggests hub wear

If you have confirmed these symptoms through inspection, replacing the front axle hub is the recommended solution.

How to Diagnose a Faulty Front Axle Hub

Before purchasing a replacement, perform these simple checks to confirm the front axle hub is the issue:

• Wheel Bearing Play Test: Raise the front axle and support it on stands. Grasp the tire at the top and bottom and attempt to rock it. If movement is present even after bearing adjustment, the hub may be worn.

• Preload Stability Check: Set the wheel bearing preload to specification and drive the vehicle. Recheck preload after a short period. If preload has changed significantly, the bearing may be spinning on a worn hub.

• Visual Inspection: With the hub removed, inspect the bearing surfaces for scoring, grooves, a step, or blue heat discoloration.

• Road Test: Drive at various speeds and note any vibration or noise that changes with speed. Vibration that diminishes when coasting is a common indicator of hub or bearing wear.

 Product Attributes

Component Location & Core Function

Location: The front axle hub is located at the outer end of the front axle assembly, mounted on the steering knuckle spindle. It sits between the steering knuckle spindle (inboard) and the wheel (outboard), with the brake rotor mounted to its outer face. The hub is enclosed within the brake caliper and wheel assembly when installed.

Connections: The hub rotates on the wheel bearings, which are mounted on the steering knuckle spindle. The brake rotor bolts to the hub face. The wheel studs are pressed into the hub flange and secure the wheel. On non-ABS applications, the hub does not have an integrated speed sensor or tone ring. The hub connects the rotating wheel and brake assembly to the stationary spindle and steering knuckle.

Core Function: The front axle hub serves as the rotating mounting surface for the front wheel and brake rotor. It carries the vehicle‘s weight through the wheel bearings while allowing smooth rotation. The hub provides a true, flat surface for the brake rotor to mount, ensuring proper brake function. It also positions the wheel at the correct offset relative to the suspension and steering components. This hub is designed for vehicles without ABS and is supplied with wheel bearings and wheel studs pre-installed in kit applications.

Package Contents

1 x Front Axle Hub Sub-Assembly (Part Number 43502-69087). Note: Bearings, seals, wheel studs, and mounting hardware are NOT included unless stated. Please confirm compatibility with your vehicle model and ABS configuration before purchasing.

DIY or Professional Installation?

This replacement is suitable for DIY if:

• You have experience servicing front axle and wheel bearing components on solid axle vehicles.

• You have access to a torque wrench, jack stands, bearing locknut socket, and a spring scale for preload measurement.

• You can safely lift and support the vehicle on level ground.

We recommend professional installation if:

• You are unfamiliar with front axle disassembly and wheel bearing preload adjustment.

• You lack the proper tools for bearing preload measurement and adjustment.

• You are not confident in setting wheel bearing preload or performing front end alignment.

Note: Improper installation can lead to wheel bearing failure and safety issues. After installation, wheel bearing preload must be properly set and verified. Use new gaskets and seals. Follow vehicle-specific procedures for preload adjustment.

Step-by-Step Installation Guide

This installation guide is designed to help you replace your front axle hub with confidence. Before starting, ensure the vehicle is parked on level ground with the engine off. You will need the following tools: torque wrench, jack stands, bearing locknut socket, and spring scale.

Step 1: Lift and secure the front of the vehicle on jack stands. Remove the wheel and brake caliper. Support the caliper aside without disconnecting the brake hose.

Step 2: Remove the brake rotor. Remove the drive flange or freewheeling hub. Remove the snap ring and bearing locknut.

Step 3: Remove the hub and bearing assembly from the spindle. Inspect the spindle for wear.

Step 4: Clean the spindle and hub mounting surfaces. Install the new hub onto the spindle with new bearings and seals.

Step 5: Set wheel bearing preload according to specification. Verify with a spring scale. Install the locknut and snap ring.

Step 6: Reinstall the drive flange or freewheeling hub. Reinstall the brake rotor and caliper. Torque all fasteners to specification.

Critical Step: Verify wheel bearing preload after installation. Check for smooth rotation and no play. Perform a front end alignment.

Pro Tip: When replacing the front axle hub, always use new wheel bearings and seals. Inspect the spindle for wear before installing the new hub. Verify that the hub runout is within specification.

Common Misconceptions About Front Axle Hubs

Myth 1: The hub rarely needs replacement.
Fact: Hubs wear over time, especially when wheel bearings have been loose or have failed. The bearing race can spin on the hub surface, wearing it down and causing preload instability.

Myth 2: Any hub will fit.
Fact: Hubs are vehicle-specific and must match the axle and wheel bearing specifications. 

Myth 3: Loose wheel bearings are always a bearing problem.
Fact: Loose wheel bearings that cannot be tightened to specification often indicate hub wear, not bearing wear. If the bearing race spins on the hub, new bearings alone will not solve the problem.

After-Sales Service & Warranty

This product is covered by our quality assurance. If you have any questions or issues regarding fitment or quality, please contact us and we will respond within 24 hours.

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