I have a 99 K2500 crew cab that acts like it is in 4 wheel drive all the time. Whenever you turn it feels like it has a locking differential in the front end with the 4WD engaged. When I do engage the 4WD it gets worse. I don't hear any sort of noise when driving straight so I don't know if my CV joints are shot or not. Have any of you had issues like this and are willing to steer me in the right direction.