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Stout72 · 11-21-2003, 12:20 PM

I'm experiencing a cyclic vibration while driving on the freeway. It occurs at about 65mph (not sure of the speed since my speedo is not calibrated for 35" tires), between 3400 - 3500rpm. I can feel it slightly in my feet thru the floorboards, and it sounds like, "a-rum... a-rum... a-rum." It almost seems to go away when I back off the throttle. Anybody have any ideas what this could be?

11-21-2003, 12:20 PM	#1
Stout72 Not my good side. Join Date: Mar 2002 Location: Fairfield, California Posts: 222	Cyclic vibration? I'm experiencing a cyclic vibration while driving on the freeway. It occurs at about 65mph (not sure of the speed since my speedo is not calibrated for 35" tires), between 3400 - 3500rpm. I can feel it slightly in my feet thru the floorboards, and it sounds like, "a-rum... a-rum... a-rum." It almost seems to go away when I back off the throttle. Anybody have any ideas what this could be? __________________ 72 Chevy K20 Custom Camper, 350/350, 4" lift, dual shock suspension front & rear. Daily driver and a work in progress. 00 Suburban LT 90 Camaro RS 79 Yamaha XS1100 Special (Ol' Reliable)