@anglia4
If you drop the pan and clean as much as you can when you refill it pop the return line from the cooler off and pop it in a bucket so when you start the motor it will pump the 2 of 3 liters out of the converter . It'll probably run dry before it runs clean so careful not to run to long . Refill and repeat till jts clean. Then top up to set level
That way your not putting that shit from the converter straight back into the new fluid