Hey! This is a heads up for anyone who has recently had or does develop this problem. I have a 1999 1500 4x4 with a 5 speed. One day last week, out of the blue, my ABS and parking brake light came and wouldn't go off. The parking brake was not on. Driving, I noticed that I lost my speedometer and the odometer. Going into 2nd gear slowing down for the stoplights, it quit, everytime. Turns out it was a sensor on the rear differential that goes to the Rear wheel antilock brakes, that also controls speed. I don't know if the automatics have one there or not, but I do know they have one in the transmission that has nothing to do with the ABS. It is a dealer only part and there are 2 different ones for 1999 depending on your VIN. Costs around $40.00. I put it on the truck the same day I got the part and it fixed everything. I hope that this can help someone else. :gr_patrio