My hot rod friends say I've got to damn many gauges now, why would I need more? Well, if something goes wrong wouldn't you want to know instead of guessing what's the deal? If your trans. was acting up and you looked over at the trans. temp. gauge and it was at 300 degrees, that might tell you something bad was happening to your trans. and you'd better pull over and shut the engine off and let it cool. But if you had no way of knowing what the trans. temp. was, how would you know it was over heating? I guess if you heard crackling or a sizzling sound coming from the trans. that might be a giveaway. Also, it is important to know what the oil temperature is since it's the factor of whether or not you have an engine left in a few moments, and it's about to seize up!