I have a 2002 Ranger 4x4 with a 4.0l v6. Every once in a while, the radio will just change channels, and try to load a cd. Once it cycles through the load phase, I just put it back on channel. The other problem is the 4x4 switch will suddenly engage the 4 wheel system then dis engage it just as fast, total time about 1.5 seconds. Any ideas???

Dan