High speed rumble

[jwebber40]

I just bought a 2002 Tahoe LS. The truck has 152k miles on it. Going down the highway I get a humming and vibration between 70 and 80 mph. It rides beautifully under 70 and over 80. Any idea where I should start?

 

[Miataracer]

I can't help you, but it sounds like you and I have the same issue! See my post of a few minutes ago.
Rick

 

[Metaldrgn]

It would seem that 70+ mph is the magic number for vibration if your vehicle is going to vibrate. I've owned multiple vehicles in the past that did it and I've seen numerous vibration dampers on later model vehicles I believe were added to try and combat this. There are many reasons it could happen. You could try rebalancing your wheels. Your transmission mount bushing may be worn. I've even read that the driveline angle on certain years of expeditions can cause this.

 

[Miataracer]

See my post to my message below this one!eace: