# 2000 Mercury Grand Marquis - Wash board

**URL:** <https://community.cartalk.com/t/2000-mercury-grand-marquis-wash-board/140014>\
**Category:** Maintenance/Repairs\
**Tags:** mercury\
**Created:** [May 9, 2019, 3:12am UTC](https://community.cartalk.com/t/2000-mercury-grand-marquis-wash-board/140014 "2019-05-09T03:12:56Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![jan54](https://avatars.discourse-cdn.com/v4/letter/j/c37758/32.png) [@jan54](https://community.cartalk.com/u/jan54)\
**Post date:** [May 9, 2019, 3:12am UTC](https://community.cartalk.com/t/2000-mercury-grand-marquis-wash-board/140014/1 "2019-05-09T03:12:56Z")

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Wash board affect from 30 to 65 mph. what could be causing this?

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**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\
**Post date:** [May 9, 2019, 1:31pm UTC](https://community.cartalk.com/t/2000-mercury-grand-marquis-wash-board/140014/2 "2019-05-09T13:31:16Z")

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I have no idea what washboard effect means to you. Please explain more fully and also tell us some details about the car and service it had.

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**Author:** ![GorehamJ](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/gorehamj/32/24103_2.png) [@GorehamJ](https://community.cartalk.com/u/GorehamJ)\
**Post date:** [May 9, 2019, 1:46pm UTC](https://community.cartalk.com/t/2000-mercury-grand-marquis-wash-board/140014/3 "2019-05-09T13:46:46Z")

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My money is on a tire in need of balancing or replacement.

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**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/48514_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\
**Post date:** [May 9, 2019, 2:09pm UTC](https://community.cartalk.com/t/2000-mercury-grand-marquis-wash-board/140014/4 "2019-05-09T14:09:18Z")

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> [@GorehamJ](#):
>
> My money is on a tire in need of balancing or replacement.

Perhaps, or perhaps the OP is trying to describe the effect of a failed torque converter lockup mechanism. Without more details from the OP, we are all just taking guesses in the dark, so to speak.

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**Author:** ![COROLLAGUY1](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/corollaguy1/32/7575_2.png) [@COROLLAGUY1](https://community.cartalk.com/u/COROLLAGUY1)\
**Post date:** [May 9, 2019, 2:42pm UTC](https://community.cartalk.com/t/2000-mercury-grand-marquis-wash-board/140014/5 "2019-05-09T14:42:03Z")

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Sometimes bad wheel bearing can cause that. Its like if you are driving on a rumble strip on the edge of the highway.My Astro van did exactly that with a bad wheel bearing.

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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:** [May 9, 2019, 3:04pm UTC](https://community.cartalk.com/t/2000-mercury-grand-marquis-wash-board/140014/6 "2019-05-09T15:04:55Z")

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The problem might be with a worn out shock absorber causing tire bounce.

Tester

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**Author:** ![edb1961](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/edb1961/32/122_2.png) [@edb1961](https://community.cartalk.com/u/edb1961)\
**Post date:** [May 9, 2019, 3:44pm UTC](https://community.cartalk.com/t/2000-mercury-grand-marquis-wash-board/140014/7 "2019-05-09T15:44:16Z")

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Tires different sizes or brands? I replaced two tires on an 1986 Dodge Colt (155/80R13). The tires were the correct size but a different brand than the other two tires. Driving home the car would start shaking at 40-45 mph.

Once I replaced the other two tires so all four were the same the shaking stopped.

Ed B.