2002 2.2L 4cyl transmission

Hello my rodeo accumulator cover is leaking. I am not under any kind of warranty so i am doing this repair my self. I have already ordered a new cover and clip. I need to know how to remove the old cover if the transmission fluid pressure does not push it out like i keep reading it should. Also do i need to replace the spring that i am also reading is behind the cover. Any info. would be very helpful cause my rodeo will remain in the garage until i can fix it, just cant afford shop prices.