H i guys had my tranny rebuilt maybe got like 15000kms, started leaking bout maybe 2 months ago. so i replaced the pan gasket and filter 3 weeks ago thinking this would get rid of my problems. no luck just slowed down a lil bit. now i bought a dipstick tube grommet and am pretty sure this is the source of the leak. my question is-- do you have to drain the fluid out b4 you change the seal or will it be ok to do when full. i really dont wanna drain it again so any thoughts are appreciated.