# F150 4WD grinding noise

**URL:** <https://community.cartalk.com/t/f150-4wd-grinding-noise/44535>\
**Category:** Maintenance/Repairs\
**Tags:** ford, f150\
**Created:** [February 15, 2010, 7:17pm UTC](https://community.cartalk.com/t/f150-4wd-grinding-noise/44535 "2010-02-15T19:17:14Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![mtscruffyjohn](https://avatars.discourse-cdn.com/v4/letter/m/53a042/32.png) [@mtscruffyjohn](https://community.cartalk.com/u/mtscruffyjohn)\
**Post date:** [February 15, 2010, 7:17pm UTC](https://community.cartalk.com/t/f150-4wd-grinding-noise/44535/1 "2010-02-15T19:17:14Z")

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I have an intermitent grinding noise coming from the front end of the truck. If I slow to 10 mph is may to away; if I turn on the 4wd I hear a ‘thunk’ and feel a mild bump and the noise goes away.  
  
  
  
 I searched the web and found a similar problem resolved by changing the IWE Selenoid - theory being issues with the vacuum. This minimized but did not solve the problem. My dealer has not been able to solve the problem … any ideas?