Well that makes a big difference...I was hoping for the best! Well I guess if you put the fan on and then felt the vibration then thats the problem..if you put a spacer on it and removed the clutch fan it may be unbalanced..if you used a factory style one they are balance to a point..that's why the blades are spaced unevenly..the aftermarket ones use smaller blades to fit in the same diameter space..try pulling off the belts one at a time and see if the vibration goes away..if you have all the belts off and it still vibrates it could be the harmonic balance..it could also be the clutch and flywhell setup also..just easier to start up front..
Joel Adams
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