the_workmaster
Member
Hey guys.
I spent the day pulling the gas (134 I think?) engine and Sherman up/down transmission from a donor 640 tractor. I'm planning to put them into a 641, formerly with a 144 diesel.
I've done a number of engine swaps in my old Ford truck, even with non Ford engines, and from the start was surprised by how interchangeable the parts are and how smoothly the swaps typically go. The sailing doesn't seem like it's going to be so smooth on this project unfortunately... and surprisingly. I figured a tractor would be a big step simpler than an automobile, so I'm surprised to learn that the Sherman transmission from the 640 has a completely different input shaft than the shaft that came out of the 641.
I know the flywheels are significantly different, but I was told that the 3.5" thick flywheel from the 641 would work with the engine and sherman from the 640 and the bellhousing from the 641. I figured the bell from the 641 must be that much deeper than that of the 640, or something along those lines.
I really hope there's still a way to make this swap work.. it obviously won't be with my 641 clutch disk (newer style, 10", 15 spline). Could I install the old style ten spline sherman in the 641 bellhousing, and just buy a 9", ten spline clutch disk and pressure plate, and run that against the ~2" thick 640 flywheel, in the 641 bellhousing? The nosecone is different between the two ages of shermans also. Will my clutch fork in the 641 be in the right place for the 640 guts? I'm shocked by all the differences, as I said, between two tractors only two years apart in age, of succeeding models.
Thanks for any guidance. Alex
I spent the day pulling the gas (134 I think?) engine and Sherman up/down transmission from a donor 640 tractor. I'm planning to put them into a 641, formerly with a 144 diesel.
I've done a number of engine swaps in my old Ford truck, even with non Ford engines, and from the start was surprised by how interchangeable the parts are and how smoothly the swaps typically go. The sailing doesn't seem like it's going to be so smooth on this project unfortunately... and surprisingly. I figured a tractor would be a big step simpler than an automobile, so I'm surprised to learn that the Sherman transmission from the 640 has a completely different input shaft than the shaft that came out of the 641.
I know the flywheels are significantly different, but I was told that the 3.5" thick flywheel from the 641 would work with the engine and sherman from the 640 and the bellhousing from the 641. I figured the bell from the 641 must be that much deeper than that of the 640, or something along those lines.
I really hope there's still a way to make this swap work.. it obviously won't be with my 641 clutch disk (newer style, 10", 15 spline). Could I install the old style ten spline sherman in the 641 bellhousing, and just buy a 9", ten spline clutch disk and pressure plate, and run that against the ~2" thick 640 flywheel, in the 641 bellhousing? The nosecone is different between the two ages of shermans also. Will my clutch fork in the 641 be in the right place for the 640 guts? I'm shocked by all the differences, as I said, between two tractors only two years apart in age, of succeeding models.
Thanks for any guidance. Alex