An arrangement for releasing a travel drive of an agricultural tractor includes a transmission controller for engaging a travel gear by activating at least one associated clutch device, and a monitoring device, which releases the engagement of the travel gear on the part of the transmission controller when it determines the presence of a corresponding driver intention on the basis of the actuating state of at least one travel operating element.

A powertrain for a snowmobile includes an engine, a gearbox input shaft and a drop case assembly receiving rotational energy from the gearbox input shaft. The drop case assembly is switchable between a forward mode and a reverse mode and includes an input gear assembly coupled to the gearbox input shaft. The input gear assembly includes a forward input pulley rotatably coupled to the gearbox input shaft, a reverse input gear rotatably coupled to the gearbox input shaft and an input selector collar between the forward input pulley and the reverse input gear. The input selector collar is slidable between a forward mode position engaged with the forward input pulley to transfer rotational energy from the gearbox input shaft to the forward input pulley and a reverse mode position engaged with the reverse input gear to transfer rotational energy from the gearbox input shaft to the reverse input gear.