i have a 2007 f-150 with about 63xxx miles on it, a leveling kit, and 35" bfg mud terrains on it. lately i have noticed that once in a while i will hear a whrrring noise from the front left side of the truck. it kind of reminds me of two gears rotating against eachother but i cant pin point it. Also it is always there, or it only makes noise after i hit 30 and goes away when i hit 60 or so. any help would be greatly appreciated.

 

I would check the wheel bearing first. How long has the noise been going on? and has it gotten worse sense it started?

 

Is this a four wheel drive?

if so, check the IWE system

Do a search in the forums under IWE.

 

it hasnt really gotten worse at least yet. and yes this is a four wheel drive truck and i will check it out.

 

x2. Shift into 4WD and see if the noise stops.

If you find out your solenoid is bad PM me. I have an extra one that is pretty much brand new.