F 350 4WD Super Duty V8-6.4L DSL Turbo (2008)
V-Ribbed Serpentine Belt With Chunks of Rib Missing
8. There should be no chunks missing from the belt ribs. If the belt shows any evidence of this, install a new accessory drive belt.
9. If the concern is not visually evident, verify the symptom and GO to Symptom Chart. See: Symptom Related Diagnostic Procedures