Been having a constant clunking when slowing down in gear whether I'm braking or not. When I put it in neutral, it doesn't do it. So far I've disconnected the ABS and unplugged the 4x4 relay and it's really helped. However, it's still there just not as bad. I also noticed that when I back up now, it makes a clunking noise unless I plug the relay back in. I also can't hear the click when I put it in 4x4 high, but it will click in 4x4 low. There is no play in transfer case or differential. U joints front or back have never been replaced. Any ideas?