If you do split it, check the PTO input shaft for wear right away. Its the hollow splined tube that sticks out of the transmission and slides into the pressure plate. Ours was heavily worn, so I replaced it when I was rebuilding the engine the last time.
'76 IH 1066 Turbo Diesel, '73 IH 766 Diesel, '72 IH 574 Utility Gas, '56 IH 350 Utility Gas, '47 Farmall H Gas, '08 Bobcat Toolcat 5600 Turbo
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Stihl, Ariens, Tecumseh, LCT, Lauson, Kohler, Subaru and Lawn Boy Certified Technician with over 14 years experience.