vibrations with rpm. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mtdave2 · 11-05-2009, 04:17 PM

I have an off rithmic vibration at 2700 – 3200 rpm, but only while driving at over 50 mph or so.

Vibration goes away, when shifting to higher gear, but keeping mph the same, so I don’t THINK its drive line. It would be connected to mph if it where, and this is rpm

Will not do the vibration while in park/neutral in drive way when reving to the rpms. the motor does sort of vibrate, a differ ant constant type, at around 3k rpm though

Stated after I had the trany rebuilt. Trany man has no ideas. Drive line guys as well.

hum

11-05-2009, 04:17 PM	#1
mtdave2 newly minted old timer Join Date: Dec 1999 Location: Hudson WI Posts: 3,521	vibrations with rpm. I have an off rithmic vibration at 2700 – 3200 rpm, but only while driving at over 50 mph or so. Vibration goes away, when shifting to higher gear, but keeping mph the same, so I don’t THINK its drive line. It would be connected to mph if it where, and this is rpm Will not do the vibration while in park/neutral in drive way when reving to the rpms. the motor does sort of vibrate, a differ ant constant type, at around 3k rpm though Stated after I had the trany rebuilt. Trany man has no ideas. Drive line guys as well. hum __________________ ____________________________________________ 72 c20 longhorn 65k org miles and counting! 69 k10 Suburban



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