Ed, on your older TS tractor, like my TS1610F, the tranny and hydraulic reservoirs are separate and don't take the same fluid like Bob's newer model does.
On the transmission oil, you don't use hydraulic fluid, use the tractor transmission oil they sell at Wal-Mart (or?) in the 5 or 10 gallon containers that conforms to the JD 303(?) spec, it''ll say on the back panel. The hydraulic reservoir, separate from the tranny case, uses a standard hydraulic fluid (for mobile equip.?). Hope this helps.
Bill