Leaderboard

When checking, ensure you're parked on level ground. To ensure accuracy, I've always pulled the dipstick, wiped, then stuck it back in ALMOST to where it will seal back on, then pulled it back out and checked the level on the dipstick. The suction of pulling it out the first time may jump the fluid level (at least on engine oil, it does). That said, add to where all holes are filled. I'm not sure about purposefully over-filling it. Generally, when something is overfilled, it will find its way out somewhere. As I recall, my 4T60 took over 20 quarts to fill, so it would take many extra quarts for it to be "over-filled." It's not as precise as a 6-quart crankcase. If it's TOO low, it will slip and not want to hill-climb. But, that should be like 10 quarts low to notice.