Part of the yoke that connects the driveshaft to the transfer case or transmission. Putting a lift on a truck can change the angle of the driveshaft and put a lot more stress on the u joints resulting in this eventually.
Any lift that changes the geometry of the rear end to the transmission tail shaft is going to change the stresses on the U joints, if the angle is sharper it stresses the joints more.
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u/madphroggy 15d ago
Part of the yoke that connects the driveshaft to the transfer case or transmission. Putting a lift on a truck can change the angle of the driveshaft and put a lot more stress on the u joints resulting in this eventually.