I've just ordered two 3320's (one for myself and one for my dad) and the Automatic 4WD was not an option we knew about. It doesn't show up on John Deere's configurator. Does this come standard on the 2006 models or does it need to be ordered and if so how much does it cost? If it needs to be ordered then what other options can be ordered that don't show up on the John Deere Configurator and how much do they cost? Thanks in advance for the help! =)