For my first car, my parents bought an '83 Cj7 for me. As of right now it isn't anywhere near good condition, but all of the mechanical systems are great. Since this is my first Jeep, and first chance to 'wheel in my own car, I have some mechanical questions. Basically what should I do when: Bearings, hubs, fluids, etc. All of the trails around here are very muddy and I know I can't just do nothing. I want to keep the jeep running for a long time and I want to learn how it works. I have a good mechanical knowledge and can do most work myself (well maybe I have a little help). I have a model 20 rear with drum brakes, a Dana 30 front with stock hubs and disc brakes.