2000 3500 4x4 6 speed... 1st one self destructed while towing around 4500lbs, now have a remanufatured still under warrenty. It was good for about 50 miles, but now is making a ton of noise and trying to engage 4H on its own. Its at my mechanic's now, but he is kinda out of ideas. Is there a linkage adjustment on them? Or any kind of adjustment that needs to be made? I just don't want to pay shipping on this beast back to where ever it came from and then to ship another one out. Please help me guys. Thanks, JOE