Ford Tech Tip: Clunk or Bump When Starting from a Stop – UnderhoodService

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Technical resources to help diagnose and repair engine-related service issues.
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Ford Tech Tip: Clunk or Bump When Starting from a Stop

Some 1997-2006 Ford E-Series, 1999-2006 F-Super Duty, 1997-2003 F-150 and 2004 F-150 Heritage 4x2 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.

Underhood Service Staff Writers
By Underhood Service Staff Writers
Published:

Some 1997-2006 Ford E-Series, 1999-2006 F-Super Duty, 1997-2003 F-150 and 2004 F-150 Heritage 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.

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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.

Courtesy of Mitchell 1.

For more information on Mitchell 1 products and services, automotive professionals can log onto the company’s website at www.mitchell1.com.

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