When your transmission is working correctly you probably aren't even paying any attention to it, but when its on the fritz, you learn quickly how expensive transmission repair can be. The best way to avoid any unnecessary problems is to change the fluid whenever the owners manual suggest, which ranges between 30k miles and 50k miles intervals. The transmission is a collection of moving parts that rely on clean transmission fluid to know shift gears correctly. There is confusion about the difference between a fluid flush and a fluid change. This video interviews the good people at Braeger Chevrolet to obtain answers on the difference between transmission fluid flush vs. change.
Hans Angermeier has produced over 100,000 videos showing drivers how to fix things on their cars. He has broad expertise on basic repair procedures covering the majority of cars on the road.