One New Aftermarket Replacement Power Steering Worm Shaft Fits Ford Tractor Models 5000 and 7000This aftermarket replacement power steering worm shaft (also called a steering shaft and ball nut assembly) Fits Ford and Fits New Holland tractors equipped with the early-style power steering system featuring the hydraulic cylinder mounted in the front support, under the radiator. The shaft features a left-hand (LH) spiral worm and measures approximately 28-13/16 inches in length. This is the correct shaft for tractors built from January 1965 through August 1970 -- after August 1970, Fits Ford redesigned the power steering system to move the cylinder inside the steering column, requiring a different shaft. Verify your tractor uses the early front-support cylinder configuration before ordering.Specifications Type: Worm Shaft, Power Steering Spiral Direction: Left-Hand (LH) Length: Approximately 28-13/16 inches Configuration: With power steering cylinder in front support (under radiator) Compatible ModelsFits Ford/New Holland: 5000 (1/1965 - 8/1970), 7000 (1/1965 - 8/1970) -- tractors with early power steering cylinder in front support onlyReplaces Part Number(s):C5NN3A710A, 81803229New aftermarket replacement part - not remanufactured, not used.