I am cheap and my whole jeep is built cheap! I want a cheap replacement for both of my front wheel bearing assemblies. They are the original ones and both have gone bad. I have a 1992 Jeep Cherokee Laredo 4wd Inline 6 4.0liter. Is it possible to just replace the bearings without replacing the whole unit if so how, where and how much? If I don't replace ever what could happen? Tire fall off? Thanks!