Not good to overfill , remove the top line going into your radiator (its your return line) put a hose over the disconnected trans line fitting comming out of the radiator (your hose will be hooked up to your radiator ,just to be clear) , run it to a bucket , turn your car on for about 5-10 sec and run some fluid out , shut your car off , reconnect your line , start your car , check level and refill as needed !