302 351 flywheel balance, 351 vibration
07-19-2009, 01:12 AM
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302 351 flywheel balance, 351 vibration
hi ive got a 1987 f 150 i put a 1994 351 in it with a 1992 aod transmission out of a crown vic 4.6, along with a 1988 351 grand marquis flex plate. it drives and shifts fine but it has a vibration at WOT. cant figure it out, any suggestions????
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07-20-2009, 01:59 PM
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Bad Vibes:
What is the character of the WOT vibration? Is it engine-rpm related or other? ....what I'm thinking is drive line wind-up from engine torque causing misalignment and wedging of the rear axle, driveshaft and U-joints. The vibe could be from some combination of engine mounts, tranny mount and rear axle windup under heavy load at WOT.