We have found a transmission service to be a very confusing topic for the consumer. Modern transmissions in many cases develop idiosyncrasies, underperforms, and even fails for lack of maintenance. So, transmission service is very important if you want your transmission to last and operate up to its full potential. We have a couple exceptions to this. A bad transmission service is much, much worse than no transmission service at all. Also, some shops are very aggressive in unnecessarily recommending a transmission service with scare tactics about how bad your fluid supposedly is.