TwinTurbo.NET: Nissan 300ZX forum - Horrible Vibration!!
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Subject Horrible Vibration!!
     
Posted by BufSabres on June 03, 2011 at 2:28 AM
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Message Here's the problem and I cannot figure it out. When I drive below 45 MPH, it's a smooth ride. As soon as I hit 46 MPH, there is a vibration accompanied with a humming noise. The faster I go, the vibration becomes worse and the humming gets louder. It reaches it's peak at approx 65 MPH and my floorboards feel like a vibrating foot massager at a shopping mall, and a subwoofer playing a solid bass line. I have replaced the wheels and tires, struts and springs, subframe spacer bushings from Z1, my drive shaft is a 1 Pc from Z1, approx 15,000 miles on it. I thought it might be the wheel bearings, but the noise and vibration does not go away when I sway left and right on the freeway. Has anybody experienced anything like this and if so, please tell me what the issue might be. I'm running out of ideas on what the problem might be. Just getting frustrated!!!

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