F 250 4WD LD Pickup V8-281 4.6L VIN W EFI (1997)
Drive/Propeller Shaft: Testing and Inspection
Driveshaft Vibration
1. Road test the vehicle to determine the critical vibration points. Note the road speed, engine RPM, and shift lever positions at which the vibration
occurs.
2. Stop the vehicle, place the transmission lever in neutral and run the engine through the critical speed ranges determined in Step 1.
3. If no vibration is felt, balance the driveshaft.
