I have a 1985 300SD that has been using a little transmission fluid as of late. I have been adding some in occasionally as needed, checking when hot (I thought!). Recently the transmission has been more hesitant in changing gears so I naturally checked the fluid level and it appears to now be too full. My question... is there a quick, easy method to drain or remove some of the fluid? Mind you I am no sophisticated mechanic so I need a layman's solution!