you may want to start a new topic, the 3000 series deck drive is totally different from the 82 series, I have owned several 82s, and it will be easier for other 3000 owners to help you with 3204.
My 3235 originally had a 60 in deck, it was too big for my new place. So I found a 44 in and sold the 60.
the decks for the 3000s were a option, base GT was deckless. the sizes ranged from 44 to 60.