I replaced the ignition lock cylinder, ignition switch and then the stearing column all because I lost my keys(long story and never again, i have 3 sets now). It drove fine about 15 miles that day. The following day i get going down the road and start hearing a "grinding" noise from under it around the middle/back. I start looking around and notice the 3 three buttons for my 4x4 on the dash are not engaging, like they have no tension behind them. Checked the fuse and its good. So not sure what to do next.Thanks in advance!!!!!