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hmm hows your fan and water pump? drop the belts and give it shot, I jad a 5.0l mustang that would shake out your fillings...water pump sprung a leak, changed it smooth as a babys bottom...step one drop the accessories and try!



we did that, still a vibration. with everything attached clutch pressed in or out, driving or just revving up, the vibration appears. with the clutch, pressure plate, d-shaft and trans out there was no vibration at any rpm.
put in new clutch, pressure plate, flywheel (refurbished from brewers), rebuilt transmission, new throw out bearing, and the vibration is still there