My 98 Ram sport 4x4 makes a strange noise sometimes when I’m driving. It doesn’t matter what speed, but seems to make the noise more in curves than on strait aways. It sounds like when your tire hits the wake up grooves just inside the emergency lane and it’s always on the front passenger side. I had the front end bearings replaced about 2 years ago and it got rid of all the noise except this.
Where I am those “wake-up!” grooves are crossways and cause an extremely loud noise and serious vibration.
What you describe could be what every front wheel drive vehicle eventually experiences; the axle assembly wears out and occasionally goes out of balance, causing vibration. Check for any play in the axle, or have a pro look at it.