The "Thud"
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Senior User
Joined: Jul 2004
Posts: 425
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From: Park Ridge, Illinois
The "Thud"
Just thought you guys may be able to help me figure out where a "Thud" in my truck is coming from....
Usually occurs after the truck has cooled off (overnight or in a parking lot for 8+ hours).
The thud always occurs after the the engine has started and has been running for 10 to 30 seconds.
The "Thud" appears to come from the right front of the car and "heavy" sounding. Some days it is "heavier" than others. It does not seem to affect the performance of the vehicle and does not happen all the time. It almost sounds like something on the susupension is breaking free / becoming unstuck, yet nothing odd seems to be happening. It does not sound like a stuck vent flap in the dash assembly.
Any bright ideas as to what to look for??
TNX!
Usually occurs after the truck has cooled off (overnight or in a parking lot for 8+ hours).
The thud always occurs after the the engine has started and has been running for 10 to 30 seconds.
The "Thud" appears to come from the right front of the car and "heavy" sounding. Some days it is "heavier" than others. It does not seem to affect the performance of the vehicle and does not happen all the time. It almost sounds like something on the susupension is breaking free / becoming unstuck, yet nothing odd seems to be happening. It does not sound like a stuck vent flap in the dash assembly.
Any bright ideas as to what to look for??
TNX!
Elder User
Joined: Jun 2005
Posts: 547
Likes: 2
From: Darien
I get "the thud" 
as it is called. LOL I leave my truck on full defrost this time of year, but I don't think that is it. My thud is when I go to move it in the morning.
as it is called. LOL I leave my truck on full defrost this time of year, but I don't think that is it. My thud is when I go to move it in the morning.
Last edited by lariat79sc; Jan 18, 2007 at 12:42 AM.
Senior User
Joined: Aug 2004
Posts: 154
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My 05 dose the same thing, it is the A/C clutch. Only does it every now and then only after truck sets for awhile.I also have the vent door thud under the dash also. Took mine to the dealer and they printed me out a paper from ford stateing that this was normal for these trucks and to turn off the A/C before turning off the truck and then after starting the truck the next morning turn back on A/C. Seemed to work, but I never remember to turn it off so I just live with it. Its kind of embarrassing though when someone gets in your truck and you start it and makes that loud popping noise!
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Senior User
Joined: Jul 2004
Posts: 425
Likes: 8
From: Park Ridge, Illinois
It seems like it is related to the vacuum. Funny thing, i have not heard or felt it in the last 10 days. My temp control system has been set to "Auto" continiously since the temperature has dropped back to "Normal" for this part of the world.
TNX for the feedback!
TNX for the feedback!
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