Timberjack 608S final drive/Planetaries

[Incotec]

Hello All,

I am new to the forum and to logging.
My friend and I bought a Timberjack 608S Feller Buncher and we need to replace the Final Drives on it. I know the undercarriage is D6 cat but i am unsure about planetaries. A member by user name Maine Logger replied to a comment in 2009 saying they might be a Cat330. Just need to know what the replacement might be.
Anyhelp would be much apprecaited.
Thanks.