An actuator system for a gear shifting mechanism with a gear shifting shaft of a motor vehicle has a first actuator having a first control member moveable into various first switching positions and a second actuator having a second control member moveable into various second switching positions. One of the first and second actuators displaces the gear shifting shaft in the axial direction of the gear shifting shaft and the other of the first and second actuators rotates the gear shifting shaft. The first and second control members have axes positioned parallel to one another. A kinematic coupling device connects the first and second control members and the gear shifting shaft.

A motor vehicle transmission which consists of a change-speed transmission and of an axle gear, is made usable by a special configuration and arrangement of the gear-shifting mechanism without modification for front engine and rear engine drive. For that purpose, the shifting rods disposed horizontally one above the other of the individual transmission speeds are operable by way of the shifting fingers of a vertically arranged shifting lever which is pivotally connected with the also horizontally disposed shifting shaft which is inserted into the change-speed transmission housing either at the bottom or at the top.

A shift mechanism for the gears of a transmission is disclosed having a pivotally mounted member. The pivotally mounted member defines an aperture. A shift lever is rotatably positioned in the aperture of the member. A shaft is positioned in adjacent, spaced apart relationship to the member. A shift finger is pivotally and slideably positioned on the shaft. A first bracket is connected to the shift lever. The first bracket is adapted for drivingly engaging a portion of the shift finger and sliding the shift finger on the shaft, whereby the shift finger is moved to select a different gear. A second bracket is connected to the member. The second bracket is adapted for drivingly engaging a portion of the shift finger on the shaft, whereby the shift finger engages the selected gear.

A shift mechanism for the gears of a transmission is disclosed having a pivotally mounted bushing assembly. The bushing assembly defines an aperture. Positioned in adjacent, spaced apart relationship to the bushing assembly is means for selectively engaging one of a plurality of gears in a transmission. A shift lever is rotatably positioned in the aperture in the bushing assembly. One end of the shift lever is adapted for drivingly engaging the means for selectively engaging one of a plurality of gears in a transmission, whereby rotating the shift lever selects the gear in the transmission and pivoting the shift lever engages the selected gear in the transmission.

A gearshift linkage for a cab-over-engine type truck having a shift lever extending up through the cab floor enables the forward tilting of the cab on the frame, about the cab pivot axis, without disengagement of the shift linkage and without dislocation of the shift lever from the cab. In the preferred embodiment, a conventional shifter control unit is secured to the cab just below the floor, with the shift lever extending up from the control unit. The control unit is equipped to accept side-to-side movement of the shift lever and translate it into rotation of a control unit output shaft, and to accept forward and rearward movement of the shift lever and translate it into generally forward and rearward movement of the output shaft. The control unit output shaft is connected through a first universal joint to a control shaft which extends forwardly and downwardly from the cab, being connected at its other end to a specially configured universal joint. The special universal joint is at the forward end of a transmission linkage shaft which extends back to the transmission and mounted to the truck frame for both axial sliding movement and rotational movement. The specially configured universal joint is at the apex of a sharply acute angle between the control shaft and the transmission linkage shaft, and is located as close as possible to the cab pivot axis, about which the cab tilts forward on the frame. When the cab is tilted forward on its axis, all of the shift linkage remains connected. The offset of the special joint from the cab pivot axis causes the control shaft to undergo some translation relative to the shifter control unit, causing the shift lever to undergo minor changes of position not detrimental to the operation or to the shift linkage.