I had a car that was extremely sensitive if it was over or under. I used a brake bleeder kit found at AutoZone and pulled some out. You don't want to do it when it is hot as you may melt the tube and you want to make sure the tube doesn't slip off and fall in the dip stick tube.

Thanks

You should correct it. Remember, when ATF gets hot, it expands. so the level will increase. You want it at the full mark with the engine warmed up and at an idle in park.