Trying to decide between these to types of diffs. When in a downhill situation will the detroit lock and keep both tires rolling the same? using brakes? using engine? Also I HATE to do "regular maintenance" on stuff like this. I'd rather buy something and just use it. I've read that "if you maintain an ARB properly" it will live a long life. What exactly does that entail? How long could I expect to run a detroit style locker before needing to replace the paws?