# 2003 Ford F150 with 200K miles transmission question

**URL:** <https://community.cartalk.com/t/2003-ford-f150-with-200k-miles-transmission-question/37047>\
**Category:** Maintenance/Repairs\
**Tags:** transmissions, fuel-economy, ford, f150\
**Created:** [September 23, 2009, 9:07pm UTC](https://community.cartalk.com/t/2003-ford-f150-with-200k-miles-transmission-question/37047 "2009-09-23T21:07:45Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![poppysmith](https://avatars.discourse-cdn.com/v4/letter/p/f6c823/32.png) [@poppysmith](https://community.cartalk.com/u/poppysmith)\
**Post date:** [September 23, 2009, 9:07pm UTC](https://community.cartalk.com/t/2003-ford-f150-with-200k-miles-transmission-question/37047/1 "2009-09-23T21:07:45Z")

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Just purchased vehicle from friend - it runs great but transmission fluid probably has never been changed. Transmission runs well … but … should I do a transmission flush with new filter or “let a sleeping dog lie”?

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**Author:** ![bennyandthejets](https://avatars.discourse-cdn.com/v4/letter/b/b487fb/32.png) [@bennyandthejets](https://community.cartalk.com/u/bennyandthejets)\
**Post date:** [September 23, 2009, 9:46pm UTC](https://community.cartalk.com/t/2003-ford-f150-with-200k-miles-transmission-question/37047/2 "2009-09-23T21:46:10Z")

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Do a transmission drain with filter change. Not a flush.

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**Author:** ![tardis](https://avatars.discourse-cdn.com/v4/letter/t/f0a364/32.png) [@tardis](https://community.cartalk.com/u/tardis)\
**Post date:** [September 23, 2009, 10:04pm UTC](https://community.cartalk.com/t/2003-ford-f150-with-200k-miles-transmission-question/37047/3 "2009-09-23T22:04:36Z")

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At 200K, do a filter and pan cleaning and then full fluid exchange.

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**Author:** ![Beadsandbeads](https://avatars.discourse-cdn.com/v4/letter/b/c57346/32.png) [@Beadsandbeads](https://community.cartalk.com/u/Beadsandbeads)\
**Post date:** [September 24, 2009, 1:02am UTC](https://community.cartalk.com/t/2003-ford-f150-with-200k-miles-transmission-question/37047/4 "2009-09-24T01:02:20Z")

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What Tardis wrote and be sure to use the fluid that is called for!

> **[atf.pdf](https://www.fcsdchemicalsandlubricants.com/Main/quickref/atf.pdf)**
>
> 83.38 KB