Re: 2006 F 150 4x4 vibration in the front at low speed
If you can,t detect any play or seisure in the u joints check the struts that keep the front axle aligned, when seriously rusted they can flex and allow the axle assembly to roll up bringing the front driveshaft out of align. I have had to replace two sets on my 95 f150.
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This could be anywhere in the drive-line. Process of elimination would be the best approach. From your symptoms it sounds like the bad vibration is noticed at low speeds. There are many moving parts within this system. Were there and recent repairs performed? New tires could cause a vibration, if the tread is aggressive. Damaged wheel-bearings, defective components inside the rear differential (suspect low fluid level, damaged ring and pinion or bearings), defective U-joints, or internal transmission failure. You didn't mention if the truck was 2wd or 4wd. If the vehicle is a 4X4 then you will need to inspect the transfer case, the U-joints in the output shaft, and the front wheel bearings. I'm not sure how far you want to go with the diagnostics. Please write back if you have other questions or to give an update to how the repair is going, good luck.
You need wheel bearings.. One for sure maybe 2. Do you feel it in the steering wheel or floor? The floor usually means rear and the steering wheel usually means front. Hope this helps. It should change pitch when you drive left to right at a steady speed. :-) Cobra
Tire vibration can be caused by a few things. Here's what to check: 1. Check the tire inflation. Make sure it's at the recommended pressure. 2. Have a local tire shop check your tire balance. If a tire is out of balance you'll notice the vibration at speeds above 50mph. 3.Wheel alignment. If the alignment is out, the tire will show uneven wear and can cause vibration also. 4. If a front wheel bearing is going out, it can cause vibration, but since your car is only 5-6 years old, this probably isn't the case. Hope this helps you narrow it down. Best of success!
first rotate the tires see if there is a change. If that does not have a desirable effect there may be a worn wheel bearing,take note if the sound or vibration gets louder as you turn a corner, try left turns as well as right turns if the noise increases it is a wheel bearing.
I think your right that its a bad bearing or hub. If your feeling it in the gas pedal and the floor, its most likely the front. If you can find an empty parking lot, try to get up to the speed it starts making the noise, and turn left and right. With the extra load being put on each bearing from turning, that will tell you which side it is.