Scott,
I get the same thing, noise only while maintaining speed. No sound while accelerating or coasting (slowing down). It's definitely a driveline vibration thing.
Do you offroad at all? My dealership diagnosed the problem as being bent rear axle stabilizer bars and a bent lateral rod, in other words, the things that hold the axle in the proper place. They wanted $1200 to replace all three. Instead we put it on the lift at a buddy's garage, took the rods off and straightened them with a jack. The sound all but disappeared, until I took it offroading again.![]()
When I get a chance, I'll probably replace them with rods from Stinkyfab. They're much cheaper, and pre-bent.![]()
Brian