# At 40rpms it feels like I'm driving on rumble strips

**URL:** <https://community.cartalk.com/t/at-40rpms-it-feels-like-im-driving-on-rumble-strips/148065>\
**Category:** Maintenance/Repairs\
**Created:** [September 3, 2019, 10:23pm UTC](https://community.cartalk.com/t/at-40rpms-it-feels-like-im-driving-on-rumble-strips/148065 "2019-09-03T22:23:39Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![telephonegirl](https://avatars.discourse-cdn.com/v4/letter/t/ee7513/32.png) [@telephonegirl](https://community.cartalk.com/u/telephonegirl)\
**Post date:** [September 3, 2019, 10:23pm UTC](https://community.cartalk.com/t/at-40rpms-it-feels-like-im-driving-on-rumble-strips/148065/1 "2019-09-03T22:23:39Z")

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Honda CRV 2009 134k mi

I had an issue where when traveling about 40mph it felt like I was driving over rumble strips. I took my car to two valued service stations with no fix. I eventually googled it and found lots of folks who’d experienced the same. Their fix was flushing out the transmission fluid.

When I brought the car back to my mechanic, explaining why I wanted to flush out the trany fluid, he laughed but obliged me. Guess what? No more rumbling from the front end!

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**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/30_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\
**Post date:** [September 4, 2019, 12:29pm UTC](https://community.cartalk.com/t/at-40rpms-it-feels-like-im-driving-on-rumble-strips/148065/2 "2019-09-04T12:29:48Z")

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You were probably experiencing a problem with the Torque Converter Lockup mechanism.  
Just for future reference, you should be changing your trans fluid every 30k miles, and you should use ONLY genuine Honda trans fluid.

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**Author:** ![circuitsmith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/circuitsmith/32/40376_2.png) [@circuitsmith](https://community.cartalk.com/u/circuitsmith)\
**Post date:** [September 4, 2019, 12:55pm UTC](https://community.cartalk.com/t/at-40rpms-it-feels-like-im-driving-on-rumble-strips/148065/3 "2019-09-04T12:55:32Z")

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Did you go back and tell the mechanic the fluid change fixed it?  
That might save him and a customer some time in the future.

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**Author:** ![telephonegirl](https://avatars.discourse-cdn.com/v4/letter/t/ee7513/32.png) [@telephonegirl](https://community.cartalk.com/u/telephonegirl)\
**Post date:** [September 4, 2019, 3:30pm UTC](https://community.cartalk.com/t/at-40rpms-it-feels-like-im-driving-on-rumble-strips/148065/4 "2019-09-04T15:30:40Z")

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I sure did!

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**Author:** ![telephonegirl](https://avatars.discourse-cdn.com/v4/letter/t/ee7513/32.png) [@telephonegirl](https://community.cartalk.com/u/telephonegirl)\
**Post date:** [September 4, 2019, 3:32pm UTC](https://community.cartalk.com/t/at-40rpms-it-feels-like-im-driving-on-rumble-strips/148065/5 "2019-09-04T15:32:34Z")

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Thank you. I’m not sure what brand of oil they used but will be sure to keep up with it in the future.