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post #1 of 14 (permalink) Old 04-20-2010, 08:53 PM Thread Starter
 
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Grinding in front end

I have noticed a grinding noise coming from the under the truck from time to time. Sounds like the font end. Im guessing hubs trying to lock in but no idea why. Definitely happens more commonly when the truck is cold. Problem Im facing is to make it stop, i pull over and stop. I get a loud clunk and than it is gone. The grinding is definitely speed sensitive. Im leaning towards hubs trying to lock in. Any other ideas or why it would be doing this? Plan on tearing into it tomorrow.
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post #2 of 14 (permalink) Old 04-20-2010, 09:41 PM
 
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K I know what it is I already had this problem with my 2004 fx4 4x4 it's the actulater on either left or right side. What happens is it looses vaccum and causes it to try to engage to 4x4 when in 2wd. My dealer fixed mine at not cost as it was pending recall.

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post #3 of 14 (permalink) Old 04-21-2010, 07:32 AM Thread Starter
 
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Good to hear, I was looking along those lines and going to ford to get some oil today anyway so Ill look into that. I wonder coiuld I test that at home with a vacuum pump? Id just like to verify the problem before taking it in.
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post #4 of 14 (permalink) Old 04-21-2010, 09:28 PM
 
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I'm not sure if there is a way to test it for sure. My dealer told me that my truck wasn't the only 1 they had to fix, the owner of the dealership had his truck in also getting the same problem fixed. If I remember the service guy told me they already fixed 4 trucks, and had 4 more to do.

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post #5 of 14 (permalink) Old 07-17-2010, 12:49 PM
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The problem is likely the vac solenoid on the firewall behind the battery . The earlier ones tended to injest water
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post #6 of 14 (permalink) Old 07-18-2010, 06:49 PM
 
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I had the same problem - front end grinding noise. I would have to pull over then I would hear a couple of clunks then could get back on the road. Ford replaced an actuator assembly; tube assembly; valve assembly. Total Cost $646.89
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post #7 of 14 (permalink) Old 07-19-2010, 07:31 PM
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Switch it into 4wd. If the grinding goes away then it is probably the actuator trying to engage the 4wd because of vacuum loss. If you still have the grinding then your problem is not yet solved.

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post #8 of 14 (permalink) Old 12-26-2010, 09:05 PM Thread Starter
 
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Well last winter I cleaned everything out blew out all the lines, tore down the hubs and all was well for the rest of winter. Low and behold it started again yesterday. Starting to think there is excessive moisture in a solenoid except the grinding only comes on when I push the throttle like kicking down to pass which leads me to believe bad vaccuum seal somewhere. Holds vac. until sudden vac loss from engine, seal cant maintain, boom...partial engagement of hub(s). Someone mentioned a recall. Is there any truth to this? Or is it a TSB?
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post #9 of 14 (permalink) Old 12-27-2010, 02:43 PM
 
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Quote:
Originally Posted by littlebronc View Post
Well last winter I cleaned everything out blew out all the lines, tore down the hubs and all was well for the rest of winter. Low and behold it started again yesterday. Starting to think there is excessive moisture in a solenoid except the grinding only comes on when I push the throttle like kicking down to pass which leads me to believe bad vaccuum seal somewhere. Holds vac. until sudden vac loss from engine, seal cant maintain, boom...partial engagement of hub(s). Someone mentioned a recall. Is there any truth to this? Or is it a TSB?
there is a 1way check valve coming from engine vaccuum,ive changed many of these.


a moments silence for the shelbyx,i hope her new owner enjoys as much.
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post #10 of 14 (permalink) Old 12-29-2010, 08:49 AM Thread Starter
 
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Ill look at that today. There would be nothing special preventing that from being tested like any other check valve?
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