In Reply to: 641 year posted by Chris on February 11, 2021 at 04:01:51:
All 641 tractors take the same clutch no matter the year, but it does make a difference which transmission you have (4-speed. 5-speed, 5-speed with live PTO). Most likely it is a 4-speed as that is what most of them have. As has been said, it will have the fine spline transmission input shaft if a 641. Earlier 640 models used a course spline shaft. This affects the clutch disc needed. I would split it first before ordering parts to see what is going on and what you need for sure.