I just purchased a used 2001. 5 3500 CTD 4x4 and noticed the steering isn't as responsive as the 2001. 5 two wheel drive 2500 was that I just sold. I bought the two wheel drive new and only had 12,000 miles on it. The 4x4 has 50,000 miles on it. Is there anything common on the 4x4's that needs attention? I don't notice the steering until I make a lane change on the freeway and then have to pull it back to get the truck back in the lane. Any ideas? Thanks