Download CLUNK OR BUMP WHEN STARTING FROM A STOP ISSUE Some 1997-2005 E-Series/F-150/F-Super Duty 4×2 vehicles may exhibit a driveline clunk or bump that occurs as the vehicle starts to move forward, following a stop. This condition may be caused by the slip yoke not sliding smoothly on the output shaft splines. ACTION Lubricate the slip yoke with Motorcraft PTFE Lubricant. Refer to the following Service Procedure. SERVICE PROCEDURE 1. Verify the condition. 2. Remove the driveshaft per Workshop Manual Section 205-01. Be sure to index-mark the driveshaft during removal to maintain alignment during reinstallation. 3. Lubricate the slip yoke with 7-13 grams (0.25-0.46 oz.) of Motorcraft PTFE Lubricant. 4. Re-index and reinstall the driveshaft per Workshop Manual. 5. Verify the repair.