Question about 2001 Ford F150 Styleside SuperCrew

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When driving down the road, the truck starts to vibrate at about 30 mph

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  • tmoores5 Feb 03, 2010

    It seems like a bad tire vibration, or out of balance. Minor, but annoying. It just started in the last few days. I had the tires checked and balanced today, but no fix. I heard a pop in the rear end one day last week, and the problem started a day or 2 later. My rear brakes had been making some noises, but I haven't had a chance to get them checked. Someone mentioned the calipers or rotor could be hanging up, or someone else mentioned a throttle position sensor. It happens at 30 mph like clockwork.

  • tmoores5 Feb 03, 2010

    I tried to balance the tires, didnt help. It just vibrates slightly at 30mph ad above, like clockwork. Under 30, nothing, but when I hit 30 it starts. Someone mentioned the brake rotors or calipers, someone else said throttle position sensor. I did have some prolems with my brakes a few weeks back

  • tmoores5 Feb 03, 2010

    There is a check engine light, but I had the codes ran and it is for a faulty thermostat or temp switch. It hasnt gottne hot, and the auto parts store said they have had a lot of those lately with the temps as cold as they have been. I will look into the brakes first, then universal joint if that doesnt fix.

  • tmoores5 Feb 03, 2010

    Thanks for the input. I think it will help.



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Hello tmoores.
There are many items on your truck to cause vibration.
At 30 MPH it isn't likely a wheel balance, usually that will begin at higher speeds.
I would look at the possibility of a bad tire, bad universal joint in a driveshaft, a hangar bearing(if it has one), wheel bearings, bent rim.
It could also be an engine or transmission problem.
If you could give a few more details on the type of vibration or the area it emanates from would be helpful.


Posted on Feb 03, 2010

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  • FUBAR Feb 03, 2010

    As I had mentioned, not likely a tire issue. But agree there is a possibility that you could have a brake problem.
    Your truck will have emergency brake shoes inside the rotor that are common for falling apart and jamming up inside. This will certainly cause a shake. A seized caliper will give similar symptoms.
    Usually you will get an odor from very hot brakes after a drive.
    You should be able to try this. Find a clear area to put in gear and begin to roll forward gently. Put it into neutral and let it roll to a stop without applying brakes. If it jerks to a stop you probably have a sticky brake.
    A pop you heard may also be the bad universal joint I suggested.
    Throttle position sensor? Hmmm, not likely. Is there check engine light on?

  • FUBAR Feb 03, 2010

    Probably a thermostat opening to soon. Be a good idea to get it replaced as it will use more fuel running too cold. Regardless of outside temperatures it should not come on. I live in an area where it is quite normal this time of year to be -20 or colder.
    I hope your repair goes well for you and is not too expensive.

  • FUBAR Feb 03, 2010

    Thank you kindly for taking the time to rate the answer.



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