thrumming in 2WD

Asked by Aug 13, 2017 at 09:13 PM about the 2007 GMC Envoy SLE-1 4 Dr SUV 4WD

Question type: Maintenance & Repair

Have noticed a rhythmic thrumming that speeds up as the car speeds up.  
This noise disappears when I switch to 4WD.  When back in 2 WD , the
thrumming returns.  Any ideas on what it is and what I can do to fix it?

1 Answer

235

Few things it COULD be without hearing it. Tires not wearing properly, tire balance, to wheel bearing hub assembly if the sound speeds up as you accelerate.

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