| After installing Powertrix adjustable tension rods, the vibration I used to get at precisely 60 mph has disappeared. However, I still have the cabin vibration at 80mph +, which isn't severe enough to shake the seats or anything but it'll affect mostly my rear view mirror. It vibrates just enough that it'll distort the rear view, which obviously goes away if I put my finger tip on the rear view mirror as a 'dampner' I have not tested it beyond 90 mph to isolate if it'll go away or not, so I'm not sure if it'll severely get worse or better depending on varying speed I was told that just by having a one-piece driveshaft (especially on the longer 2+2), it's inevitable to get some vibration from the one piece unit. Has anyone experienced the mirror distortion/vibration? Although a reputable Z mechanic informed about the one-piece vibration, I'm a bit skeptical. I guess my options are: 1. Live with it if it's normal
2. Try balancing the AMZ 1 piece shaft
3. Try balancing the tires again, for the 3rd time.
thoughts?
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