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Automotive glossary

Kingpin

A kingpin is the steering pivot on older front suspensions and beam axles, around which the wheel turns.

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What is Kingpin?

Modern cars use ball joints instead. Kingpins and bushes need regular greasing. Wear causes play and vague steering. Grease should appear at the top and bottom bushes when they are greased properly.

How it works

The stub axle swivels on the kingpin, supported by bushes and a thrust bearing.

Why it matters for your car

Grease kingpins at the stated interval. Worn kingpins can fail an inspection.

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