Abstract: A transmission for a working vehicle comprising a front frame and a rear frame interconnected to be pivotable relative to each other on a substantially vertical axis. The transmission is mounted together with an engine on the rear frame. A casing housing the transmission includes an upper case housing a change speed portion of the transmission and a lower case housing an output portion of the transmission. The upper case supports an input shaft operatively connected to the engine and surrounded by a planetary change speed gear assembly constituting the change speed portion. The planetary change speed gear assembly has an input gear mounted on a front portion of the input shaft and an output gear mounted on a rear portion of the input shaft. The lower case supports an output shaft operatively connected to the output gear. The output shaft includes a coupling device at a forward end thereof for connection to a propeller shaft for driving front wheels.

Abstract: There is disclosed a power transmission control apparatus having a clutching function and a modulating function and enabling a vehicle installed with this apparatus to make a sudden start after a clutch has been disengaged. The apparatus includes a main change speed control valve (V2), a backward and forward switch valve (V1), a modulation valve (MV) and an inching valve (IV).

Abstract: A gearing transmission has two operatively different sets of planetary transmission apparatuses and is adapted to enable speed changing in six steps in the forward running travel and in two steps in the rearward running travel. The two operatively different sets of planetary transmission apparatuses have only one common internal-tooth gear and only one common spider.

Abstract: A working vehicle according to this invention comprises right and left traveling members (1a, 1b) adapted to be driven and stopped individually or simultaneously to effect traveling and turning round of the vehicle, a traveling speed changing mechanism (8) for providing a high speed drive and a low speed drive and including an operator member (8a), and a switch mechanism (13) adapted to automatically and reversibly switch the traveling speed changing mechanism (8) from a position to provide the high speed drive to a position to provide the low speed drive when the vehicle traveling straight turns round.

Abstract: A vehicle with an engine, a torque converter, planetary gearing sets operatively connected with the torque converter, running means on either lateral side operatively connected with the respective planetary gearing set, a turning drive mechanism with two output shafts to rotate in opposite directions with each other and switching over means for selectively switching over output rotation directions of the turning drive mechanism. The turning drive mechanism takes the driving power from input side of the torque converter and transmits the power to drive either sun gear or planetary gears of the planetary gearing sets, thus to cause differential rotary speeds of the running means on one side as compared with the other side. The vehicle can thus turn very sharply when it travels at slow speed.