# 2000 Ford F-150 - Chatters at 45

**URL:** <https://community.cartalk.com/t/2000-ford-f-150-chatters-at-45/168452>\
**Category:** Maintenance/Repairs\
**Tags:** ford\
**Created:** [August 9, 2020, 5:47am UTC](https://community.cartalk.com/t/2000-ford-f-150-chatters-at-45/168452 "2020-08-09T05:47:32Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Hp1957](https://avatars.discourse-cdn.com/v4/letter/h/b9e5f3/32.png) [@Hp1957](https://community.cartalk.com/u/Hp1957)\
**Post date:** [August 9, 2020, 5:47am UTC](https://community.cartalk.com/t/2000-ford-f-150-chatters-at-45/168452/1 "2020-08-09T05:47:32Z")

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When my truck is between 45 and 50 it seems to chatter a bit  
Then going 50mph it is fine,if I take overdrive off around town  
I have no problem

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**Author:** ![davepsinbox\_157004](https://avatars.discourse-cdn.com/v4/letter/d/73ab20/32.png) [@davepsinbox\_157004](https://community.cartalk.com/u/davepsinbox_157004)\
**Post date:** [August 9, 2020, 8:32pm UTC](https://community.cartalk.com/t/2000-ford-f-150-chatters-at-45/168452/2 "2020-08-09T20:32:42Z")

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Offhand I suspect a problem with the torque converter lockup. Start by checking the transmission fluid but I doubt it’s that simple. Bring it in to a good independent transmission shop for a diagnosis.

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**Author:** ![ok4450](https://avatars.discourse-cdn.com/v4/letter/o/e9bcb4/32.png) [@ok4450](https://community.cartalk.com/u/ok4450)\
**Post date:** [August 10, 2020, 9:21pm UTC](https://community.cartalk.com/t/2000-ford-f-150-chatters-at-45/168452/3 "2020-08-10T21:21:39Z")

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Try changing the transmission fluid and filter. It sounds like a rumble strip torque converter shudder which is pretty common with Fords. Worst case scenario is a new converter but I would not fret over that at this point.

Every Ford I’ve owned that developed this shudder was resolved by a simple fluid change which I normally do at 30 to 40k miles intervals. In the event I let a 30k slip by me I usually get a reminder around 35k miles when the transmission starts to develop very subtle signs of this problem.

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**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\
**Post date:** [August 11, 2020, 12:37am UTC](https://community.cartalk.com/t/2000-ford-f-150-chatters-at-45/168452/4 "2020-08-11T00:37:11Z")

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If the transmission fluid/filter change doesn’t work. then try this in the transmission fluid.

[https://www.lubegard.com/products/isf/](https://www.lubegard.com/products/isf/)

Tester