Steven:

I have been chasing a couple of different vibrations. One type seems to
happen much the same as yours. My speedo reads 90 km/h to 100 km/h.
Running Yoko 370's which I noticed tend to pick up alot of road
imperfections. The Yoko's also throw my speedo out by 5 km/h. At 105
km/h, real speed is 100 km/h. Because the wheels have been balanced;
high speed, low speed, on vehicle, one technician suggested that the
lack of load on the front diff was causing a slight vibration. I don't
know how. Checked all the mounts, seem ok. Front CV's ok.

The other vibrations happen at certain rpm's up and down the power band.
Less pronounced on the way up than on the way down regardless of speed.
2700, 3100, 4100.

Hope this helps. Good luck. Let me know if you discover the source.

Randy Feuerriegel
88 syncro

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