One problem related to brake antilock wheel speed sensor has been reported for the 1998 Dodge RAM. The most recently reported issues are listed below.
When applying brakes downhill and going over a bump on pavement abs system releases. Will not grab again until vehicle is on level ground. Taken to dealer 3 times, said vehicle operated as it should, and abs system was fine. Disconnecting speed sensor, eliminates the problem, but it is potentially dangerous.