Comments: This consult factory applies to the following axles: JLG p/n 1001135441 prior to Dana axle s/n Y-ITA-720476 JLG p/n 1001175670 prior to Dana axle s/n Y-ITA-716714 JLG p/n 1001214519 prior to Dana axle s/n Y-ITA-717951 Per the vendor this piston kit is no longer available. For proper service replacement please order and replace with the following: JLG p/n 70027319 Piston Kit (qty. 1) JLG p/n 70027317 Friction Spring (qty. 3)