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There is a design for a three-link rear end that utilized a lift-arm or pull-bar where the left-rear spring is mounted in front of the rear end and the right-rear spring is mounted behind the rear end. When the car accelerates and the rear end rotates as the lift-arm or pull-bar moves, the left-rear spring compresses and the right-rear spring decompresses. This adds an amount of weight to the left-rear wheel and takes weight off the right-rear wheel. If this makes the rear tires more equally loaded, the car will have more traction to help provide better bite off the corners.