I hit 30k so I did the transmission drain and fill. Pretty easy process, easier than the oil change. The drain bolt was fairly hard to take off, broke my cheapo $2 wrench from Harbor Freight..haha.. Only thing I forgot was to buy a new washer. I just assumed it would be the same washer was the oil drain bolt washer but it's a bigger one so oil bolt washer doesn't work. I reused it, just made sure not to overtighten since the washer is already crushed down. Ended up putting in 2Q and 22 ounces, meaning left 10 ounces in the 3rd bottle. I gathered the old transmission oil into an old 5Q Mobil one jug and estimated how much came out. Check twice at engine warm up and waiting 60 seconds and it touches the top line exactly, not a hair above. I think next time, I'll put in 2Q, 20 ounces. Plan on doing it every 30K, even the oil transmission oil was fairly red, even though the color has nothing to do with breakdown..