Product Details: Ensuring you are Ready for the Road Ahead™, the Spicer 1760 Series Half Round Greaseable Universal Joint lends to 30% increased bearing life than the leading competitors. The universal joint permits driveshafts to move up and down with the suspension while the shaft is moving. With precise heat treatment, hardened case, and enduring processes of journal grinding, this heavy duty replacement u-joint ensures power can be transmitted when the driveshaft is not in a straight line between the semi truck’s transmission and drive wheels. Experience maximized life and decreased maintenance time/costs thanks to this universal joint with 180° positioned zerks positioned on both sides for consistent lubrication without rotation of driveshaft.