I changed the transmission fluid on my 4l60e. Only 4 quarts came out. It needed 6 quarts to be within the hot mark. Was i really 2 quarts low? Tranny was shifting fine before the fluid change. I checked the fluid with the tranny warmed up after changing it and in park after 30mins of driving. I thought it being 2 quarts low would cause all kinds of shifting problems especially at wot but it did not.