transfer case rattle I think ????
When driving in 2wd and the drive shafts are not under load I have a very significant rattle (metal on metal) it sounds like coming from the transfer case. When I drive in 4wd Low or 4wd High there is no rattle.
I have checked the u-joints and feel good that they are all in good shape.
The transmission shifts fine and seems to not have any indication that it is a problem.
I am thinking that I need to pull the transfer case and rebuild it as a starting point. It is a 1973 jeep cj5 with untold miles. The engine has been replaced but I believe the transmission and transfer case to be original.