434420K010 Toyota CAP, KNUCKLE GREASE RETAINER, INNER, RH/LH, Price: 9.56$, Weight: 0.069kg

Inner Grease Retainer Cap for Toyota Steering Knuckle ️

This small but vital cap sits inside the front steering knuckle and seals the grease cavity around the birfield/CV joint. It fits either side (RH/LH) and works with the wiper and felt/seal set to keep thick moly grease in and dirt, water, and mud out. Built to OE spec for Toyota 4x4 front axles, it ensures smooth steering and long joint life.

Why this part is needed

• Maintains correct lubrication inside the knuckle.
• Prevents contamination from off-road grit and water.
• Reduces wear on CV joint, kingpin/knuckle bearings, and seals.
• Keeps steering feel consistent and quiet.

How it works ⚙️

The cap press-fits into the knuckle housing and mechanically retains the grease and inner wiper stack. Its firm seating creates a barrier so centrifugal force does not sling grease out. In tandem with outer dust shields and gaskets, it forms a sealed chamber that survives heat, pressure, and axle articulation.

If the cap is damaged or missing

• Grease leaks onto backing plate and brakes.
• Water ingress leads to rust and pitted CV bearings.
• Steering shimmy, clunks, or grinding under load.
• Premature failure of knuckle bearings and seals.

Replacement tips ️

Clean the bore, lightly oil the lip, and drive the cap in square without deforming. Refresh the felt/wiper set, pack with NLGI #2 moly CV grease, and inspect knuckle studs and gaskets. Replacing both sides together restores balance and protection.

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