Grinding sound when 4x4 engaged in front end, happens only when turning

What is your question?

Just replaced both front wheel hubs and new propeller shaft c/v joint, drove it down the road in 4 hi and thought it was good until I turned into driveway to return home, grinding sound came from front end and could tell it didn't want to move freely anymore. Returned it to 2wd and backed up a few feet and it went away. This sound only happens when I turn when in 4 wheel drive, could this be the front differential making this noise? I am a good mechanic but never messed with a 4x4 before so any info is greatly appreciated