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Username Post: '00 Chevy C2500 Vibration
Posts: 117

Age: 38
Loc: San Antonio, Texas
Reg: 01-31-19
03-29-21 03:16 AM - Post#2817029    

My truck is a 2wd crew cab with the 5.7.

Between 30-40mph I've got a weird vibration. Doesn't appear until I reach at least 30 mph, peaks at 35mph & begins to disappear at 40mph & is completely gone at highway speeds.

If I hold the speed at 35mph it's bad. Feels like a bad tire. Meaning that it feels like a vertical vibration. I'd accept that it was a bad tire if I didn't have a brand new set of cooper's balanced with less than 1k miles on 'em. And if th vibration didn't disappear past 40mph.

I've never encountered a speed sensitive vibration so I'm at a bit of a loss here. My only thoughts are harmonic balancer or possibly driveshaft carrier bearing.

Any input/ideas are greatly appreciated.
'91 Chevy C1500 SC LWB
'89 Suburban 4WD

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