I've developed a strange vibration (almost like a buzzing but everything shakes) at 55+mph on my '99 D1. I thought it was maybe tire balance, front end alignment, etc. so I had the tires balanced and rotated and the front end aligned. Still have the vibes, anyone know what's going on?
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9dawgs 
'99 Discovery I
'99 Chevy Astro 4X2 w/4" Lift (family truckster)
17' Basstracker w/40HP Mercury
11' Jon Boat w/numerous antique outboards
