How often should a typical driveshaft hanger bearing be lubricated?

A) when U-joints are lubed
B) they are usually factory lubricated and are not serviceable
C) each time the slip yoke is lubed
D) both A and C

Hanger Bearing

The center support bearing used to suspend the first section of the drive shaft in a double drive shaft assembly; used on truck drivelines when the distance between the transmission and drive carrier exceeds 70 inches (178 mm) or so. Consists of a sealed rolling element bearing that is supported by a rubber insulator and mounted in a bracket assembly. Also known as center support bearing.

Factory Lubricated

Refers to components that are pre-lubricated during manufacturing, reducing the need for initial maintenance.

U-joints

Universal joints, flexible pivot points that allow the transmission of power at varied angles between shafts in a drivetrain.