C 3500 Truck 2WD V8-454 7.4L VIN J SFI (1999)
Center Support: Description and Operation
Center bearings support the driveline when using two or more propeller shafts. The center bearing is a ball bearing mounted in a rubber cushion that
attaches to a frame crossmember. The manufacturer prelubricates and seals the bearing. The cushion allows vertical motion at the driveline and helps
isolate the vehicle from vibration.