The transmission in the tractor is different than that of a simply manual transmission car.
The biggest difference is that there are TWO SHAFTS!
The central shaft drives the transmission - same as usual.
But, a collar around that drives the Power Take Off (PTO)
Because of that, to maintain the independent PTO, I'll need the flywheel and clutch. Otherwise, I wouldn't be able to pull away from a stop with the PTO already spinning.