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GM Engineering developed the first independent wheel suspension system, lessening the impact when any of a car’s four wheels hit a bump or hole and making the car safer as well as more comfortable. Popularly known as "knee-action" suspension because of the way each wheel was connected to the axle, it was introduced in all 1934 model year GM cars in the North American market.

Additional Information:

In 1935, General Motors Customer Research published this guide to Knee-Action. Click here to view the entire pamphlet.