Engine vibration between 1,300 and 1,600 rpm's

1965 FORD MUSTANG
154,000 MILES • 5.7L • V8 • 2WD • AUTOMATIC
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L.R. SMITH
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I have a vibration between 1300 and 1600 rpm then it clears out and returns at around 2,300. I have replaced the transmission support and the vibration got worse. I removed the fan belts and the vibration got better by about 1/3. Fan blades and harmonic balancer you think? Thanks
Feb 6, 2020 at 6:13 AM
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ASEMASTER6371
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Good morning,

The fan was my first choice as well.

If it continues, then it could be the balancer, flywheel or worse case is the crankshaft itself.

It is externally balanced with the balancer and flywheel.

Roy

Feb 6, 2020 at 6:46 AM