TOYOTA 43236-60020 Steering Knuckle Kingpin Bearing Shim

The genuine TOYOTA 43236-60020 kingpin bearing shim (SHIM, STEERING) is a critical precision component engineered for the accurate adjustment of kingpin bearings on solid front axle suspensions. Selecting a shim of the correct thickness is essential for maintaining suspension geometry and ensuring steering stability.

Technical Characteristics and Function

The primary function of the kingpin bearing shim is the micrometer-accurate adjustment of axial play or preload on the kingpin bearings. Improper shimming directly affects vehicle handling and bearing service life.

• Material: Premium quality, high-tensile precision steel resistant to continuous dynamic loads and deformation.
• Installation Position: Front suspension, between the kingpin mounting bracket and the knuckle housing.
• Surface Treatment: Anti-corrosion coating for resistance against environmental impacts and moisture.

Signs of Improper Shimming or Wear

If shimming is inaccurate, or if the shims become worn or corroded, the following symptoms may occur:

• Steering Wobble (Death Wobble): Excessive play from loose kingpin bearing adjustment can cause wheel instability, resulting in severe vibration through the steering wheel.
• Unstable Road Handling: Free play within the suspension assembly leads to imprecise directional tracking.
• Premature Bearing Wear: Excessive preload leads to overheating and premature failure of the kingpin bearings.
• Uneven Tire Wear: Alterations in camber angle cause accelerated wear on the inner or outer edges of the tires.