2000 Ford F-150 Shakes at 40 MPH

1940 FORD F-150
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DAMASTA686
  • MEMBER
  • 7 POSTS
i have a 2000 f-150 i recently went mudding in and now that i drive it it starts bouncing really bad at about 40 mph and idles funny when stopped. i hosed off everything very good and it still does this can anyone help me?
Dec 11, 2006 at 5:05 PM
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CATCH_15
  • ✓Experienced Mechanic
  • 250 POSTS
Sounds like your U-joints are shot.
Dec 11, 2006 at 5:09 PM
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DAMASTA686
  • MEMBER
  • 7 POSTS
it only does it when i hit the gas...when i let off it stops
Dec 11, 2006 at 5:10 PM
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Suggested Repair

Inspect the driveshaft U-joints and replace them if worn, since the bounce occurs under acceleration after mudding.

Conversation Summary

The owner of a 2000 Ford F-150 reported severe bouncing around 40 mph and a rough idle after mudding, even after thoroughly washing the truck. An expert suggested the U-joints were worn out. The owner added that the bouncing occurs only when accelerating and stops when the throttle is released.

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