Diesel Truck Forum - TheDieselGarage.com - View Single Post - after a lot of money the truck still ain't right
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post #8 of (permalink) Old 12-21-2007, 05:14 AM
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So its still there with the module turned off or unplugged? Is it a speed issue or an RPM issue? Harmonic frequencies with spinning things can cause all kinds of weird vibration that comes and goes depending on how fast it is spinning. If its a speed thing, I would guess drive shafts out of balance or something like that. If its an RPM thing I would guess clutch or fly wheel. My friend had a similar issue with his 01 auto and an edge. anything stage 2 or above would vibrate when a load was put on it, that turned out to be the drive shaft. My stock converter used to vibrate terribly when going into lock up because of a warp front cover. With the added power you are throwing at it, a worn out clutch or flywheel wouldn't surprise me at all. Could also be something inside the trans, but that seems far less likely.

2000 2500 reg. cab 4x4 auto 577hp
09 6.7L QC LB stick, 4x4.

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