hello,
I have a 2004 ford f150 xlt. I just replaced my brake pads and front left and back right calipers. After replacing this i went for a drive and there is now a new grinding noise. The grinding does not start until about 20MPH and only occurs when i am pushing the gas. the sound doesnt occur when i am going under 20 mph and doesnt work when i am breaking. Does anyone have any suggestions on what this could be?

 

i have a buddy with same problem mine as well shop figured it out it was the seal for vacum hub in the 4 wdrive or a post on here said check the iwe solenoid

 

I had this same problem after I replaced my front pads. I took it in and they said there was some safety clip or something rubbing and they put it back and it stopped. Shortly after I had sort of the same grinding noise come back and it ended up being bad bearings in the hub. Replaced the hub and have been noisefree for a few months now.

 

i have done both my front wheel bearings and it did not stop the grind that is what i thought as well but every repair job can be diff mne are just what happened to my truck for ref

 

i have an 06 a buddy checked with code reader. c-1979&c1980 came up.iwe solenoid needs replaced. mine would stop making noise when i switch to 4hi and cme back when i go to 2hi. they say the iwe gets wet and contaminates the vaccum to the hubs. the replacement part is of anew design.

 

yes i have picked up the update and i took of the front wheels started the truck up and the passenger side is free put the drivers side is locked up so my seal is leaking i also checked the vacum 20 lbs from the motor then it splits of to both front seals when i plugged the drivers side i had 20 at the passenger side when i hooked up the drivers side it dropped down to only ten and the new solenoid cost me 27 dollars cdn from ford

 

I have the same problem and mine didnt start till i put my 6" lift on last week , u can feel the floor vibrating a little.

 

Your vaccum solenoids are not working. You need to take it in and get them replaced. This was a warranty issue to where water would drain down the cowl and short out the solenoids. Ford has made the fix.

 

just last week i took my 04 screw in for a grinding noise from the frontend and both of the front hubs were bad and the motor on the tcase was goin out...so now i have new front hubs, iwe's, and that electric motor on the tcase

 

I had a smiliar problem only is was this high pitched shrieking/squeeking droning noise. I fixed it by pulling over to the side of the road and made my wife get out of the truck. All was quiet after that.

 

Classic! I can't believe I didn't think of that!

 

HAHAHA good one!!!!