Moog 578 Constant Rate Coil Spring Cross body is drilled and tapped with dual grease fittings for easier access during regular joint maintenance. Patented thrust washer technology absorbs axial loads preventing metal to metal contact and ensures even grease distribution to the wear surfaces. Thrust washers are manufactured to tight tolerances to allow for easier driveshaft balancing. Includes an exclusive anti-drainback design to control lubrication flow and prevent dry start up. Needle bearings are from the original equipment supplier to ensure size consistency, proper hardness, and strength to evenly distribute loads and provide longer life. Metal shielded nitrile rubber grease seals are engineered to use a compressed double lip design to ensure more effective protection from contaminants and are purgable for longer life.