1978 - 1996 Big Bronco

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Bad Vibrations!!

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Jun 27, 2005 | 05:01 PM

#1

BroncoBoss351

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Joined: Jan 2005

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Question

Bad Vibrations!!

I think i need a new harmonic balancer, but at idle and around 1200-1400rpms the whole truck shakes, at first i thought motor mounts, then tranny mount or something involved with the tranny, then that i might be misfiring because i just change plugs. not sure, but can a harmonic blanacer, when bad, make a truck shake that bad?

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Jun 27, 2005 | 06:28 PM

#2

bertha66

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Joined: Oct 2004

Posts: 8,062

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From: Central Oregon

You may want to pull all the belts off the engine and then start it. This way you can see the harmonic blanacer run. Or if you have no vibrations it could be one of the other pullies.

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