# E350 Ford Super duty Box Truck **URL:** \ **Category:** Factual Questions\ **Created:** [March 29, 2011, 11:58am UTC](https://boards.straightdope.com/t/e350-ford-super-duty-box-truck/576373 "2011-03-29T11:58:52Z")\ **Posts on this page:** 1\ **Showing post:** 1
**Author:** ![billjulian](https://avatars.discourse-cdn.com/v4/letter/b/cc9497/32.png) [@billjulian](https://boards.straightdope.com/u/billjulian)\ **Post date:** [March 29, 2011, 11:58am UTC](https://boards.straightdope.com/t/e350-ford-super-duty-box-truck/576373/1 "2011-03-29T11:58:52Z")
I have a unique noise from my truck that sounds like fluttering rather loud at almost all speeds even when the engine is off in neutral coasting. Had the front end done checked U joints and DIff…all good. 19,000 miles. Sounds and feels like you have to open a window to relieve air pressure but that doesn’t not help. Tranny was checked too. I’ve been on many BB sites noone can figure it out but its annoying. I have a big box truck with a translucent roof that ocilates a little bit but I’m not sold that it is the roof yet. I almost bought a wind deflector thinking that could be the problem…(wind) but not sure yet because I hear it at even 3MPH its crazy I’ll take any thoughts --- _[View the full topic](https://boards.straightdope.com/t/e350-ford-super-duty-box-truck/576373)._