I've got an 85' pickup thats got a Marlin 4.7 case in it. It had sat and not really been used in about 2 years. I took it out the other day and used the case a little. After using it and coming home i heard some growling and realized that it is the Tcase. I played with it today and if i'm out of 4 wheel it makes noise. If i am in 4 wheel it works fine and makes no noise. Any suggestions to make the growl go away?

 

Could be a rust issue and that some parts simply arent working good.

 

Make sure it is full of oil, they can make noise when they're low.

Also could be bearings going bad.