the road itself does not make noise. it is your tires on contact with the road and your suspension insulators that transmits vibration and noise inside the cab. start with cruising tires. even a lexus sedan will make noise if you use the wrong tire. then, check your suspension rubber bushing for wear and age. if they are not firm and pliable anymore, it might be time to replace them. long before rubber insulators (bushings) were installed on the suspension, they used metal to metal, that's right, metal to metal flex joints on the lower control arms. they transmit noise and worse if not lubricated with suspension grease an additional squeakiness (specially ford) happens. in the late '70's, the suspension were insulated and even the engine noise isolation was beefed up by the additional rubber insulation on the engine/transaxle cradle to further isolate noise, vibration and harshness (NVH). with your car, again start with the right type of tire with the correct air inflation pressure. nip the problem at its cause or origin similar to spraying air freshener in the room without removing the dead rat, would still smell dead rat





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