As modern diesel trucks become ever more powerful, and regulations from governmental agencies become ever more intense, the demand for a reliable, economical, and versatile automatic transmission has become more important than ever. Unfortunately, as transmissions become more complex as they have in recent years, two things begin to happen. One; is that they become much harder to fix when something goes wrong, causing fewer technicians to learn to repair them. Two; is that they become more likely to fail due to there are simply more things that can break. Some of these technological advancements are in our favor, but others are not.