Your Caster Correction Guide for Solid Axle 4WDs

Is your solid axle 4WD difficult to control, especially after lifting it? The solution might be simpler than you think—caster correction! This guide will help you understand the importance of caster correction, how it affects your vehicle, and the best options available to correct it.

 

What is Caster, and Why is it Important?

Caster refers to the angle of the steering axis, which affects the vehicle's stability, steering control, and ability to self-centre. Positive caster helps maintain straight-line stability, while negative caster can cause speed wobbles and poor handling. For solid axle 4WDs, correcting caster is crucial, especially after lifting them.

 

Common Caster Correction Issues

When you lift your 4x4, the fixed geometry of the radius arms changes, affecting the differential angle and reducing the caster angle. This reduction in caster can lead to:

  • Poor straight-line control
  • Increased tyre wear
  • Unstable handling at high speeds

How to Correct Caster

There are methods to correct caster in solid axle 4WDs, here are a few:

Caster Correction Bushes:

  1. Offset Rubber Bushes: Often used but prone to wear and failure.

  2. Polyurethane Offset Bushes: More durable than rubber and provide better alignment retention.

  3. Radius Arms with Built-In Caster Correction:

SuperPro Radius Arms: Designed to suit the specific lift of your vehicle, providing better correction and durability.

Caster Wedges (for leaf spring front vehicles):

  1. Placed between the leaf springs and differential to set the correct caster angle.

Why Choose SuperPro?

SuperPro products are designed to offer superior performance and longevity. Their radius arms with built-in caster correction provide the best solution for lifted vehicles. Benefits include:

  • Enhanced vehicle stability and handling

  • Reduced tyre wear

  • Improved steering response and self-centering

  • Lifetime warranty on bushings

  • Heavy-duty Polyelast and Polyurethane bushings for increased reliability

  • Easy direct replacement

  • Australian designed and engineered

FAQs

Q: What are the signs that my 4WD needs caster correction?

A: Signs include poor straight-line control, speed wobbles, increased tyre wear, and unstable handling at high speeds.

Q: Can I use offset bushes for a lift greater than 3 inches?

A: Offset bushes are recommended for lifts of 2 to 3 inches. For larger lifts, radius arms with built-in caster correction are more effective.

Q: How do caster wedges work for leaf spring vehicles?

A: Caster wedges are placed between the leaf springs and differential, adjusting the angle to set the correct caster.

Q: Why choose SuperPro over other brands?

A: SuperPro offers superior durability, enhanced handling, and a lifetime warranty on their bushings, making them a reliable choice for caster correction.

Q: Where can I buy SuperPro caster correction products?

A: Search our website to see if there are SuperPro caster correction products for your vehicle. We have a wide range of SuperPro products suitable for various 4WD models. All you need to do is enter your vehicles details and click ‘find my suspension’, you can then see all of our products available for your vehicle.

Recommended Caster Correction Products

  • SuperPro Caster Correction Bushing Kits: Provide better flex, comfort, and reduced noise while increasing caster angles for better handling.

  • SuperPro Radius Arms: Correct caster for the specific lift and offer 600% less deflection than standard arms.

Vehicle Compatibility