The Dana Incorporated Spicer ReadyPack are preassembled kits for popular commercial vehicle driveshafts, coupling shafts, and interaxle shafts. The kits are designed to save on time and to offer convenience, streamlined ordering, and savings on inventory and labor costs. Featuring 100 percent genuine Spicer components, Spicer ReadyPack kits arrive with U-joints that are professionally installed in the yoke shaft for the slip joint and in the tube yoke for the tight joint. Kits featuring Spicer Life Series (SPL) U-joints come pre-greased with production lube and sealed with the multi-lip seal, while 10 Series U-joints must be greased before use.