Abstract: In a gear shifting device for the manual transmission of a motor vehicle with a gearshfit lever, with which the individual gear steps can be engaged over a gearshift rod, the gear shifting motion of the gearshift lever is transferred to the gearshift rod in a nonmechanical manner. The movement of the gearshift lever from the neutral position into the gear shifting position takes place in two steps, the first step acting as a preselection step and the function of the second step being to engage the selected gear step. A locking device permits movement of the gearshift lever from the first into the second step only when the necessary conditions exist for engaging the selected gear step perfectly; that is, when the clutch is disengaged and the gear wheels of the gear steps to be engaged are synchronized.

Abstract: A gear-shift mechanism for motor-vehicle multi-step transmissions with interruption of traction is designed in the manner of a semi-automatic transmission. Manual control switched 80, 81 connected to a control unit 82 serve to actuate shift forks via servo systems 90. Sensors coact with rotating marks on the power take-off shaft and with marks on the speed gears which are driven by the drive shaft. The relative phase position .phi. between the speed gears and the gearshift sleeves driven by the power take-off shaft is determined by a phase detector 75. When a pre-determined phase position is reached, these elements are brought into engagement with each other.