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2004 - 2008 F150 2004, 2005, 2006, 2007 and 2008 Ford F150's with 5.4 V8, 4.6 V8 or 4.2 V6 engine
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  #1  
Old 12-16-2007, 11:24 PM
05150 05150 is offline
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05 F150 Front end noise

My 05 F150 with 50K miles started making a hum or Grrrr sound from the front end. It is not coming from the engine. When I take my foot off the gas (so I dont hear the exhaust system) you can hear the sound. It continues and gets more noticable as the car coasts to a stop. Any ideas???
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Old 12-17-2007, 12:28 AM
boots6868 boots6868 is offline
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Quote:
Originally Posted by 05150
My 05 F150 with 50K miles started making a hum or Grrrr sound from the front end. It is not coming from the engine. When I take my foot off the gas (so I dont hear the exhaust system) you can hear the sound. It continues and gets more noticable as the car coasts to a stop. Any ideas???
Cant be sure my 04 fx4 never did it yet but others on here have posted proplems with 4x4 partially engaging due to vacumn loss at the hubs??
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Old 12-17-2007, 12:43 AM
05150 05150 is offline
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Thanks. Read many of the posts on the vacumn loss. I hear the noise when I am coasting. If I switch to 4hi while coasting there is no change in the sound.
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Old 12-17-2007, 08:09 AM
Joe04F150 Joe04F150 is offline
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Are you sure the 4wd is coming on when you are switching it? I'm having this problem with my truck now but only in real cold weather will I get the noise. Moisture is getting in my hubs and freezing up causing it to loose vacum. I've already replaced a hub and the solenoid...
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Old 12-17-2007, 08:21 AM
05150 05150 is offline
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The 4wd seems to be coming on. From what I have been reading, if that sound was due to the solenoid it would stop when you put the truck into 4wd.
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Old 12-17-2007, 10:11 AM
Joe04F150 Joe04F150 is offline
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Did you take a look at the brake pads? I don't remember if they had wear indicators..
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Old 12-17-2007, 05:23 PM
05150 05150 is offline
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I put it up on the lift and ran it it 4wd. It seems to be a wheel bearing. I will try that and let you know. Thanks for the insight.
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Old 12-19-2007, 06:58 PM
baitmaster baitmaster is offline
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That was my first guess, a wheel bearing. If you jacked it off of the ground and gave it a spin, you will know right away. If it is suspect, I replace them. Sometimes if you brake hard, they will get louder, if they are fronts. On the older vehicles, sometimes they just needed to be tightened up and regreased. Look for blue or black coloring, indicating it got hot. (Cracks, spalling, in extreme cases)
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Old 05-08-2008, 02:52 PM
05150 05150 is offline
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The noise is back

Well. I replaced the driver side wheel bearing a few month ago and it seemed to take care of the problem. I thought I could still hear the sound if I listened close. Today the sound is back and getting louder. Not sure where to go now. Would moisture in the vacume lines eventualy cause a bearing failure??
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Old 05-11-2008, 09:50 PM
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Did the grease look normal when you pulled it, or did it look runny and off color? Also usse the high temp type of grease for disc brakes.
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Old 05-13-2008, 05:29 PM
YoungbloodFORD YoungbloodFORD is offline
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Don't know if this helps but I have a 4x2 that has been making the same noise for a while. Brought it to the dealer for help. I let them listen to it while costing/ lightly turning the steering wheel at a stop light will make the low "grr" sound as well and the truck has to be in drive, if its in nuetral it won't make the sound. They told me to bring it to a different service center to have it looked at. Didn't have time to do it so I am still waiting to get it looked at.
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Old 05-13-2008, 05:29 PM
 
 
 
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