Similar has happened to me in trucks and cars. Every time I couldn't find the problem. Soon the tread separated from the tire. Some good tires, some cheap, some low mileage, some high. But they all finally separated at highway speeds. (Really fun in an overloaded work truck or in the hearse I used to own.) Cheap way to eliminate that cause is to rotate tires to see if location of vibration changes or disappears.
07 Steel Blue Overland CRD QDII | Bilsteins | 4xguard Matrix | Rear SRT8 SwayBar | DashHawk w/egt | Provent MBRP XP Exhaust | New Intake Tube & Seal + EHM | Alternator Splash Guard | Crank Sensor | GPS AL InMotion Hack | Swirl motor bypass | Blue WK Club Member #13 | 200,000 Mile Club | Dogpiled Club | pre-N23 FDCM |
89 GW w/plow