This is in regard to my 99 Ranger with 4WD.
After I hit a bump or an expansion joint in the road, it starts sounding like I am driving over one of those grated bridges. A real smooth low vibration. This stops when I slow to under 28mph. It also "sometimes" stops when I hit another bump. I don't feel it in the steering wheel nor brakes, but I get the sense that it is somewhere in the front suspension or driveshaft. Oh...I do not use the 4WD feature. Wondering is there is some typical thing that might happen with this particular truck. I've not had it long enough to be very familiar with it. Thanks.