[kathyricks]

Flushing via your method is controversial whereas draining and refilling just the oil pan is not. So I use the pan only method.

The final step - getting the hot fluid level correct - is the most critical and most overlooked. You must drive at least 20 minutes around town and in the suburbs to get the fluid up to normal operating temperature and then you need to get the fluid level all the way up to the top of Full Mark. If the transmission is even one pint low on fluid you will lose some horsepower and fuel economy because power transfer is less efficient.