I'm rebuilding a t-20 that was worked on by someone without a clue who lost some parts. I bought this 6x6 for $600 dollars so I don't mind redoing someones bad work. The planetary gears have a thrust washer on the side away from the carrier plate. I'd like to know how to know if this transmission had one or two thrust washers on the planetary gears. Also if there is only one thrust washer does it go between the carrier plate and the planetary gears or on the opposite side of the gears? I don't trust anything that has been done to this transmission. Thank you for any help.