Hey everybody, I searched around but i couldnt really find anything just like what im having in the fourm

I have a 2004 F-150 FX4 4x4 with 80k with a 9.75 LS, recently I've had the truck start making a humming sound/vibration (simaliar to the sound/feel you get when crossing onto rumble strips, only not as intense) when at speed anywhere above 20 mph or so, its doing this all of the time. The strange thing about the sound is that is only occurs when I am driving completely straight or to the left, if have the steering wheel just slightly turned to the right of center, the sound and vibration completely goes aways until the wheel returns back to center. also I've started to notice that sometimes (not all the time) at lower speeds when let off of the gas and decellerate i'm gettin a very high pitch whine that sounds like a metal-metal sound but only lasts for a few seconds then goes away.

I cant tell where if the sounds are coming from the front or back and i cant decipher which side it is coming from.

Also, I dont know if it is related but over the summer, probably june or so, i had to drain the fluid from the rear end and replace and add an extra bottle of friction modifier to get rid of the shuddering problem alot of people with 04's have run into.

Anyone else run into this kind of problem? I'm tryin to save some money from the dealership hunt and peck method of solving problems lol

Thanks alot,
Dave

 

Well, the grinding noise almost sounds like a wheel bearing being you said it changes when you turn the wheel, or possibly a bad IWE actuator (for your 4x4).

The high pitch sounds like ring gear whine, and yes the shudder is a bummer (mine is REALLY bad).

Does the noise get more intense if you turn left hard?

 

The noise is the same if the wheels are center or left, no difference in how hard i cut the wheel..

 

Try driving in 4x4 and see if the noise changes/goes away

 

Tried driving it in4x4 last night, no difference, if anything i think it was worse, one more thing i did notice though, the sound doesnt seem to start right away when the truck is real cold, but starts after driving/warming up a bit

 

I wish some one knows what that could be mine is doing the same .

 

I had a 97 that did a similar thing (based on the description). The cause was the inner axle bearings.

Curious as to what you find....


CMOS

 

This post is pretty old but just to update you guys that are wondering i did remedy the problem, it was the front left wheel hub bearing making the noise and vibration, 320 dollar part, easy to replace and i havent had any problems since.

 

Thanks for following up on this. Glad the issue was resolved.