the input shaft has splines on it which connect to the clutch friction plate.
From the engine, there is the clutch shaft which drives/or connected to the Input shaft, which in turn drives the output shaft.
A spigot shaft is also known as a primary shaft or an input shaft in an automotive gearbox. It protrudes from the gearbox into the bell housing and connects the clutch plate to the transmission.
front transmition shaft Input Shaft
21t
It is the number of rotations of the input shaft to the gearbox as compared to the number of rotations of the output shaft from the gearbox. The ratio will change each time a different gear is selected.
In a gearbox, the three main shafts are the input shaft, output shaft, and countershaft. The input shaft receives power from the engine, transmitting it to the gearbox. The countershaft, which is typically connected to the input shaft, helps to facilitate gear changes and transfer power to the output shaft, which delivers the final drive to the wheels. Together, these shafts work in conjunction to manage torque and speed ratios within the drivetrain.
It will be due to the input shaft bearing in gearbox.
In a gearbox fitted to a front-engine, rear-wheel-drive vehicle, the three shafts are the input shaft, output shaft, and countershaft. The input shaft transmits power from the engine to the gearbox, enabling the transfer of engine torque. The countershaft, which is connected to the gears, facilitates the gear changes and allows for varying torque and speed outputs. Finally, the output shaft delivers the power from the gearbox to the rear wheels, driving the vehicle forward.
Steel sandwich plate. 5 speed count splines on input shaft
As it combusts, heat is created. Heat and the expansion of air caused by heat is what drives the pistons. The pistons drive the crankshaft, the crankshaft drives the flywheel, the flywheel drives the input shaft to the transmission, the input shaft drives a series of gears in the transmission, which in turn drives an output shaft to the differential, and from there you get power to your wheels. That's the nickel tour of how it works. The crankshaft will also drive other components, such as your belt pulleys, camshaft, etc.
Depending on which end it's coming from, you probably have either a leaking tailshaft at the PTO gearbox, or a leaking input shaft seal on the hydraulic pump.