when i roll down my driveway i can hear a grinding noise and seems to be in front end. I have replaced 1 wheel hub assembly and 1 lock out. new brakes all the way around. everything seems tight no play in wheels or u joints. need some help im stumped and don't know what to check any more

 

Inner axle bearing? the needle bearing where the axle stub rides inside the wheel bearing.

Lock the hubs and see if the noise goes away.

 

I will try locking the hubs. Noticed today that when i touch the gas a little bit the sound changes. Thinking hanger bearing. But sounds like its up front. When i put it in 4x4 it does not change

 

Then it's almost definitely not the axle stub bearing - when it's in 4x4, the bearing does not spin in relation to the axle stub.