what type of fluid is in the transmission of a 1998 grasshopper model 618 lawn mower?

I've searched for an hour or so and can't find an answer but it will use either hydraulic fluid or a specific kind of transmission fluid. I found an article for another brand of equipment that uses Dextron III as the fluid. While I was looking I came across these parts diagrams for your machine and hated to let it go to waste by not posting it.

http://www.the-mower-shop-inc.com/618_1998.aspx

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RE:

what type of fluid is in the transmission of a 1998 grasshopper model 618 lawn mower?

Reservoir is bone dry and I want to put the right fluid in.

Grasshopper 618

They were great mowers I still have one myself I also every once in a while spay wd-40 on the linkage to the trans to keep it moving smooth. rarely do the sealed trans need oil . Hope this helps!

I have already went thru those steps that's why I came to a forum, to find answers not suggestions.

do you have a owners manual if not call your local Lawnmower

repair shop and ask what the gear oil used in your unit is.

just regular tranny fluid probably, ask your hardware store guy.