So my mechanic is about to perform first ever drain and fill it (seems) on my newly acquired 2004 camry 4 cylinder with the u241e transmission. (170k) I am a little nervous because I have no background on the transmission/car other than one owner. The fluid is coffee brown and smells like old motor oil or crayons and not like burnt toast or some of the other things I have heard. It's also not thick and not completely black. We are using type 4 original toyota fluid changing the filter cleaning the pan.. could I have any of you guys stories of high mileage changes on your Toyotas and what the outcome was. The transmission changes fine it's just somewhat jerky in lower gears at stop signs. Any advice would be appreciated!