Iv been reading up on my issue and finally i found something similar to mine .
I got 08 sr5 4.7 and this issue been on since i bought the car but not as bad as last long drive about 300 miles up to 70 everything is fine but once im going past 70 mph i can hear this harmonic hauling and harmonic vibration underneath my feet up 80 mph and than it goes away oo and one more think its only happening between 70-80 with foot on the gas once im gonna take foot off the gas everything goes away and gets quiet but then gas on and starts again it getting worst when heading against heavy wind or when i got car loaded with tool and other crap if some out here had the same issue and found the FIX PLEASE HELP ITS ANNOYING AND HELL
