Hey guys got a 03 F250 4x4 and I am having an odd vibration on the drivers side floordboard and a loud howling sound in 2wheel. I have thought hub assembly but I am leaning towards transmission now. It's noticable in the mid to high 50 MPH then around 60 to 70 it gets a loud howling, almost like tire sound but I'm sure it's mechanical, there brand spankin new BFGs A/T, balanced, aligned and all. When I let off the accelerator the howling kind of changes, like reverses itself, and then back on the gas it comes back. When I hit about 80 it quiets a little.
Things I have done so far is the carrier bearing, and still vibrates. U joints on the driveshaft looked in good shape but we know how looks can go with those and I'm 90% positive it's in the front end, also I made sure the driveshaft went right back in the way it came out. I feel no vibration in my brake pedal or steering. I don't really feel it in the seat, more under my feet if I place them under the gas and brake. Thanks fellas