# Have noise from back end of Ford f150

**URL:** <https://community.cartalk.com/t/have-noise-from-back-end-of-ford-f150/66608>\
**Category:** Maintenance/Repairs\
**Created:** [July 26, 2011, 8:35pm UTC](https://community.cartalk.com/t/have-noise-from-back-end-of-ford-f150/66608 "2011-07-26T20:35:56Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![margareterose](https://avatars.discourse-cdn.com/v4/letter/m/7ea924/32.png) [@margareterose](https://community.cartalk.com/u/margareterose)\
**Post date:** [July 26, 2011, 8:35pm UTC](https://community.cartalk.com/t/have-noise-from-back-end-of-ford-f150/66608/1 "2011-07-26T20:35:56Z")

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I have a ford f150 that is making a loud banging noise from the rear end. It only makes this noise when you are travelling down the road and let your foot off of the accelarater. A mechanic told me it is the catalytic converter but I am questioning this for he also told me it needed a tune up. A tune up was just recently done therefore I am just trying to find better answers to this problem.

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**Author:** ![keith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/keith/32/5518_2.png) [@keith](https://community.cartalk.com/u/keith)\
**Post date:** [July 27, 2011, 5:42pm UTC](https://community.cartalk.com/t/have-noise-from-back-end-of-ford-f150/66608/2 "2011-07-27T17:42:22Z")

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This loud banging sound, is it like the bang of a gun or a mechanical bang like hammer on nail? Is it one bang or a series of them? Do you feel anything? If a series of bangs, does the frequency of occurrence change with speed?

Need some vehicle info too. Year, engine, transmission, RWD or 4wd?