# 2002 Ford F150

**URL:** <https://community.cartalk.com/t/2002-ford-f150/34992>\
**Category:** Maintenance/Repairs\
**Tags:** ford, f150\
**Created:** [August 13, 2009, 3:38am UTC](https://community.cartalk.com/t/2002-ford-f150/34992 "2009-08-13T03:38:09Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![PammyZ](https://avatars.discourse-cdn.com/v4/letter/p/b4bc9f/32.png) [@PammyZ](https://community.cartalk.com/u/PammyZ)\
**Post date:** [August 13, 2009, 3:38am UTC](https://community.cartalk.com/t/2002-ford-f150/34992/1 "2009-08-13T03:38:09Z")

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My truck thumps? at 40 mph. The rpms do not change or jump, and it seems that the thumping does not occur while accelerating rapidly. However, it does happen consistently when hovering around 40 - 50 mph.

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**Author:** ![rockstar07](https://avatars.discourse-cdn.com/v4/letter/r/d9b06d/32.png) [@rockstar07](https://community.cartalk.com/u/rockstar07)\
**Post date:** [August 13, 2009, 3:43am UTC](https://community.cartalk.com/t/2002-ford-f150/34992/2 "2009-08-13T03:43:17Z")

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Where is the thump coming from? Does it occur under load? Have you tried putting it in neutral while at speed to see if the goes away?

Perhaps it could be a bad belt in one of the tires?

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**Author:** ![PammyZ](https://avatars.discourse-cdn.com/v4/letter/p/b4bc9f/32.png) [@PammyZ](https://community.cartalk.com/u/PammyZ)\
**Post date:** [August 13, 2009, 3:49am UTC](https://community.cartalk.com/t/2002-ford-f150/34992/3 "2009-08-13T03:49:28Z")

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There is no load. It is coming from the engine, and makes the whole truck shudder/jump. It only happens once just as I accelerate past 40, and then it stops. But it will happen every time I pass 40 mph.