Dana Spicer 5-777X or 5777X U-joint kit, a greaseable 1610 series half round design supplied without a strap kit. A U-joint is a cross-and-bearing assembly that lets the driveshaft keep transmitting power while it runs at an angle.
Because this one is greaseable, grease goes in through the fitting until fresh grease purges at the seals, which confirms the bearings are covered. Dark or metal-laced grease coming out points to overheating or bearing wear. A clunk when shifting between drive and neutral suggests lash in a worn joint, and a squeak at low speed usually means it wants grease. A genuine Dana Spicer part from Pro Gear and Transmission. Call us to confirm proper fit.
Features
Greaseable universal joint kit
1610 series half round design
Supplied without a strap kit
Genuine Dana Spicer part sold by Pro Gear and Transmission
Grease that purges dark or metal-laced signals overheating or bearing wear
A clunk on shifts or a low-speed squeak are common signs of a worn or dry joint
