That all checks out. The driveshaft doesn't spin. The one turns one way and the other the other. Still begs the question of why I'm getting the noises and lack of power in articulation.
In 4wd with the front end off the ground, both front axles are locked together and turn, but they do that in park. The back is not off the ground. That doesn't seem right. What next?
I tried spinning the driveshaft with the truck in park. No luck. It's locked it somewhere. When I put it in and out of 4wd I can hear something moving in there, but I can't tell where exactly. Is it best to start with the transfer case or the axle/differential? It definitely comes in and out of 4wd because I use it fairly often where I'm at. I'm assuming the front end is locked then?
I have a 2003 chevy 2500hd with the 6.0. For a couple years now I've had 4wd engage disengage issues. It just sticks a little. I've got a weird noise though that I can't find any info on. It sounds like gears grinding in the front end. It only happens when the front right tire is trying to be pushed up a small incline or out of a dip. It sounds like a manual transmission that is just grinding gears instead of going in. It doesn't matter if 4wd is in or not. I know the front right wheel bearing is starting to go bad but I don't know if that's related.