We are about the same age. I graduated in 67. It was the last Ford my dad bought.
We had a dairy. Dad thought of his as a BIG bile of COW Poo.
I think many tractor had issues when they used parts off the shelf to make next model tractor with more horse power. My Jubilee is just one of them.
I think Farmall used the old M drive train and put a bigger engine in front of it when they went to the number series.
Chevy got in to trouble using a gas engine block in their attempt to make a diesel.
The list of mistakes could go on forever.
My lesson from this is not to buy a new car or truck with some new engine or tranny design. I wait for the consumer to do the R&D and the company to fix it.