The Muncie Locking Sleeve, part number 12004421, is a genuine Muncie Power Take-Off replacement component. Locking sleeves are critical engagement parts within a PTO assembly, controlling the mechanical connection between the PTO and the driveline. This part is sold by Pro Gear and Transmission. Call us to confirm proper fit for your specific PTO model and truck application before ordering.FeaturesGenuine Muncie part number 12004421Locking sleeve for Muncie Power Take-Off assembliesDirect replacement for worn or damaged OEM locking sleevesSold by Pro Gear and Transmission