# Rear end vibration

**URL:** <https://community.cartalk.com/t/rear-end-vibration/19167>\
**Category:** Maintenance/Repairs\
**Created:** [September 6, 2008, 2:30am UTC](https://community.cartalk.com/t/rear-end-vibration/19167 "2008-09-06T02:30:48Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![scott\_lee](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/scott_lee/32/144_2.png) [@scott\_lee](https://community.cartalk.com/u/scott_lee)\
**Post date:** [September 6, 2008, 2:30am UTC](https://community.cartalk.com/t/rear-end-vibration/19167/1 "2008-09-06T02:30:48Z")

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i have a 96 crown vic 4.6L v8 ,i just got it and all i did before i bought it was drive it around town , so i never got above 50mph ,well after i got the car i noticed that at about 45-55mph i get a real bad vibration in either the rear-end or the trans ,for just a sec. then it stops with no effect on the power or performance of the car ,what can it be ???

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**Author:** ![oldschool](https://avatars.discourse-cdn.com/v4/letter/o/e19adc/32.png) [@oldschool](https://community.cartalk.com/u/oldschool)\
**Post date:** [September 6, 2008, 5:34pm UTC](https://community.cartalk.com/t/rear-end-vibration/19167/2 "2008-09-06T17:34:08Z")

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I would call the seller up and ask,just to see what is said. You have to do now what you should have done before purchase (was the car a gift) have it inspected.

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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 7, 2008, 12:36am UTC](https://community.cartalk.com/t/rear-end-vibration/19167/3 "2008-09-07T00:36:56Z")

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Does this happen every time? Does it feel like rumble strips?

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**Author:** ![Countrydriver](https://avatars.discourse-cdn.com/v4/letter/c/ce7236/32.png) [@Countrydriver](https://community.cartalk.com/u/Countrydriver)\
**Post date:** [September 7, 2008, 12:48am UTC](https://community.cartalk.com/t/rear-end-vibration/19167/4 "2008-09-07T00:48:26Z")

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Take it Back!!! The seller knew about this and didn’t tell you. Just a guess, but it sounds like it could be a bad pilot bearing either at transmission output shaft, or if the car is so equipped, a bad carrier bearing supporting the drive shaft.

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**Author:** ![mr\_josh](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mr_josh/32/3008_2.png) [@mr\_josh](https://community.cartalk.com/u/mr_josh)\
**Post date:** [September 7, 2008, 2:45am UTC](https://community.cartalk.com/t/rear-end-vibration/19167/5 "2008-09-07T02:45:38Z")

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It sounds like the infamous 4r70w torque converter shudder, often remedied by a fluid flush and refill with Mercon V fluid.