[RDrancher]

Check the front axle fit at the outer axle seal, at the hub and also the axle u-joint itself. I know you're not running around in 4wd, but it's not uncommon for the front driveshaft to turn a bit and the axles turn as well. I had a bad axle fit at the seal that would bang here and there...locked the hub which centered the axle in the seal and it went away.