vibration stops when turning right
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vibration stops when turning right
So got the truck (75 f150 2wd) on the road and have been drivin her around for the past few days. There is a hum/vibration that is speed dependent (not rpm or trans, doesnt change in neutral when revved). Sounded like it was coming from the driver side..ish. Got new (to me) tires on the front today to replace the grossly undersized junk that came with it when purchased. thought the vib decreased slightly, but still present.
So I replaced the driver side wheel bearing tonight (under the advice of a friend who was "sure" it was a bearing), which definitely had some wear (inner race had a couple grooves worn in it and the outer bearing cage was slightly bent out of round). Again it seemed as thought the hum decreased significantly but was still present. However, the hum does have an interesting peculiarity, if i turn right the noise goes away completely (but not left that ive noticed), which seems to rule out a driveline vib.
Any ideas? Alignment, other wheel bearing? sell it while I still can? jk
So I replaced the driver side wheel bearing tonight (under the advice of a friend who was "sure" it was a bearing), which definitely had some wear (inner race had a couple grooves worn in it and the outer bearing cage was slightly bent out of round). Again it seemed as thought the hum decreased significantly but was still present. However, the hum does have an interesting peculiarity, if i turn right the noise goes away completely (but not left that ive noticed), which seems to rule out a driveline vib.
Any ideas? Alignment, other wheel bearing? sell it while I still can? jk
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The vibration really sounds like tire noise, but I know the tires are ligit. The radius arm bushing is pretty worn out, could this cause the noise im hearing due to an incorrect angle on the wheel/tire?
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There is absolutely no vibration at stop whether the engine is revved or at idle, and the motor mounts appear intact. It is only dependent on rolling speed. Plus if I throw it in neutral while rolling and kill the motor there is no change. Pretty much ruled out motor mounts (good thought tho) or any driveline problems.
This has got to be a wheel/alignment/steering/suspension problem of some kind. I did check the most obvious thing and made sure the tire wasnt rubbing on something (Ive made more stupid mistakes in the past) . All of the suspension bushings appear to be stock, so after replacing the other wheel bearing, I guess thats the next thing to chase. This is rather frustrating...
The truck is quite drivable, the vibration is just minor, but very annoying. maybe ill just drive it till something breaks.. thats usually a good way to ID a problem
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Check the track bar bushings. Its a bar that connects to the front axle on one end and a bracket on the frame on the other. Get something like a prybar and move it around and see if the bushings are worn out.
If the radius arm bushings are worn, then yes I would replace them.
If the radius arm bushings are worn, then yes I would replace them.
Hotshot
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From: THIS IS SPARTA!, ...Mo.
I hate to state the obvious, but if you only replaced ONE side of the wheel bearings, it's most likely the OTHER side is bad too. ESPECIALLY if it goes away when you turn the wheel. You're loading the bearing to one side and taking up all the play in them. Sure does sound like a bearing noise from here.
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I hate to state the obvious, but if you only replaced ONE side of the wheel bearings, it's most likely the OTHER side is bad too. ESPECIALLY if it goes away when you turn the wheel. You're loading the bearing to one side and taking up all the play in them. Sure does sound like a bearing noise from here.
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Hotshot
Joined: Jan 2011
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From: THIS IS SPARTA!, ...Mo.
I've always been fortunate to hear directionality very well. I'll ride in a vehicle and the owner swears the noise is coming from one direction and I can plainly hear it coming from the opposite direction. Noises like that that are hard to nail down. Especially since your ear is closest to the driver's window where the noise is coming in the cab from the outside.
Good luck, keep us posted.
Good luck, keep us posted.
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Ok, so I got someone else to drive and sure enough, it was coming from the passenger side. Replaced the wheel bearing and the noise is gone. Kinda feel like an idiot for not doing both at the same time but.. oh well. Thanks for the insight earthquake68
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