Compact transmission having a power takeoff shaft and hydraulically actuated clutches

Claim 1

A vehicle transmission comprising: a housing including first, second and third generally parallel wall members; input shaft means transpiercing generally normally and journalled in said first, second and third generally parallel wall members; an output shaft journalled in said second wall member and journalled and transpiercing said third wall member, said output shaft disposed in a generally parallel relation to said input shaft; a first sun gear drivingly associated with said input shaft means; an intermediate output shaft coaxially mounted about said input shaft means and journalled in said second wall member; a second sun gear drivingly mounted on said intermediate output shaft, said first and second sun gears disposed between said first and second generally parallel wall members; a planet carrier coaxially mounted about said input shaft means; a plurality of clustered planet gears each cluster rotatably mounted on said planet carrier and each cluster comprised of a first planet gear and a second planet gear integrally formed one with the other, said first planet gear intermeshing with and driven by said first sun gear, said second planet gear having a different number of drive teeth than said first planet gear and intermeshing with and driving said second sun gear; first clutch means for selectively connecting said planet carrier with said input shaft means to rotate said intermediate output shaft at a speed equal to said input shaft means; first brake means for selectively stopping rotation of said planet carrier relative said input shaft means to allow said plurality of second planet gears to rotate said intermediate output shaft at a different speed than said input shaft means; a countershaft journalled in generally parallel relation to said input shaft means between said second and third wall members; a directional drive section driven by said intermediate output shaft comprising a forward pinion gear drivingly mounted on said intermediate output shaft, a reverse pinion gear drivingly mounted on said intermediate output shaft, a forward driven gear rotatably mounted on said countershaft, a reverse driven gear rotatably mounted on said countershaft and in intermeshing relationship with said reverse pinion gear, a reversing cluster gear rotatably mounted on said output shaft including a first gear in intermeshing relationship with said forward pinion gear and a second gear integrally formed with said first gear and intermeshing with said forward driven gear, and directional drive engagement means associated with said countershaft and selectively movable in a first direction for drivingly engaging said forward driven gear with said countershaft and selectively movable in a second direction for drivingly engaging said reverse driven gear with said countershaft; and a plurality of speed-reducing drive means selectively engageable with said countershaft for rotating said output shaft at differing rotational speeds relative said countershaft, wherein the transmission housing further comprises a halfwall between the second and third walls, and further wherein the intermediate output shaft is journalled in said half wall.