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Triple BBastard of the NorthMARegistered Userregular
Could be several things. First thing I would look at is a broken belt in the tire. (you wouldn't see this per se, your tread could still look ok but could feel it with your you hand as the tire is turned at a decent rate of speed). The way I check is get in on a lift and spin it good but this may not be an option for you.
You said it's a truck, is it 4 wheel or 2 wheel drive. What kind of truck?
King Kong on
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Triple BBastard of the NorthMARegistered Userregular
edited September 2010
4WD 1993 toyota pickup standard. And it's not so much a vibration as a *thud. thud. thud. THUD. THUD. THUD.THUD.THUD.THUDTHUDTHUDTHUD*
Is there a nail or screw embedded in the tread? That can cause thumping noises like what you describe, and if it's in there just right, it won't even deflate the tire.
It might be worth it to take it to a tire place and have them check it.
Is it a thudding noise only? Or is there also a shudder to the car? My Mom's truck had a terrible shimmy when driving between 20-40 and it was a mix of the tire belt disintegrating and the tie rods needing to be replaced (which were both mentioned above).
I had the exact same symptoms caused by a seized front caliper. The rotor warps and then this starts happening. At first it was pretty minor, but within a few days it got very loud.
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Otherwise, is it 4WD? How many miles?
You said it's a truck, is it 4 wheel or 2 wheel drive. What kind of truck?
It might be worth it to take it to a tire place and have them check it.