I just purchased the factory LR3 hood deflector because I am on my third windshield, so I want to try it out to see if it will work. My question is I have it on the truck as long as I am below 30 mph there is no noise as soon as I go over 30 mph it makes an loud humming and rattling noise!! any ideas

 

Do you have all of the pieces secured properly...I have one on my LR3 and cannot hear that at all (maybe I play my stereo too loud). I did notice once that the corners come undone (I think after going through a carwash) but, for the most part, never heard the noises.

Installation was fairly simple...maybe undo and redo?

 

I have taken it off and one three or four times, Like you said it is very easy to install, however it still does the humming noise I contacted the dealer I bought it from and he suggested a hood bumper? I guess my big question is does it really work it seems to aerodynamic to actually deflect bugs or rocks compared to other's I seen on different trucks.