Abstract: A synchromesh mechanism includes a shaft, a shift sleeve, a first gear and a second gear arranged at the both sides of a hub, and a first synchronizer ring and a second synchronizer ring arranged at the both side of the hub. The shift sleeve has a length so that it can start contacting with the first synchronizer ring and the second synchronizer ring at the same time.

Abstract: A transmission includes a first power transmitting path of gears that obtains odd number speeds and has an output part, a second power transmitting path of gears that obtains even number speeds and has an output part; a first gear shifting part incorporated in the first power transmitting path to obtain one of the odd number speeds, a second gear shafting part incorporated in the second power transmitting path to obtain one of the even number speeds, and a path shifting part that is arranged between the first and second power transmitting parts. The path shifting part shifts the first second power transmitting paths to output power to the output shaft.

Abstract: A transmission includes a first power transmitting path of gears that obtains odd number speeds and has an output part, a second power transmitting path of gears that obtains even number speeds and has an output part; a first gear shifting part incorporated in the first power transmitting path to obtain one of the odd number speeds, a second gear shafting part incorporated in the second power transmitting path to obtain one of the even number speeds, and a path shifting part that is arranged between the first and second power transmitting parts. The path shifting part shifts the first second power transmitting paths to output power to the output shaft.

Abstract: A synchromesh mechanism includes a shaft, a shift sleeve, a first gear and a second gear arranged at the both sides of a hub, and a first synchronizer ring and a second synchronizer ring arranged at the both side of the hub. The shift sleeve has a length so that it can start contacting with the first synchronizer ring and the second synchronizer ring at the same time.

Abstract: A first input shaft and a second input shaft; a first friction clutch and a second friction clutch that can transmit motive power from a motive-power source to the first input shaft and the second input shaft; a speed-changing gear mechanism provided with a shared gear that can connect the first input shaft and the second input shaft, the speed-changing gear mechanism that can connect/disconnect the motive power from the first input shaft and the second input shaft and select a plurality of speed changing levels; and an output shaft that outputs the motive power from the speed-changing gear mechanism are provided. Upon start, a first speed level is selected, both of the first friction clutch and the second friction clutch are coupled, and the motive power from the motive-power source is transmitted to the output shaft via the first friction clutch and the second friction clutch.

Abstract: A four wheel steer control system includes a four wheel steer system, a differential between right and left driving wheels, a slip limiting system for limiting a differential action of the differential with a slip limiting resistive force whose magnitude is varied in accordance with a vehicle speed or other variable, a sensor for sensing the magnitude of the slip limiting resistive force, and a controller for controlling a ratio of a rear wheel steer angle to a steering wheel angle in accordance with the magnitude of the slip limiting resistive force.

Abstract: A vehicle is equipped with a four wheel drive system having a transfer, a four wheel steer system for steering front wheels and rear wheels, a sensor for sensing a condition of a driving torque distribution between the front wheels and rear wheels, by sensing a condition of the four wheel drive system, and a controller for controlling a rear wheel steer angle in accordance with the condition of the driving torque distribution by commanding the four wheel steer system in such a manner as to maintain the desirable weak understeer characteristic irrespective of change in the driving torque distribution at least when a vehicle speed is greater than a predetermined value.

Abstract: Herein disclosed is an improved direction changing mechanism used in a shift control mechanism of a transverse manual transmission. The direction changing mechanism comprises a drive member movable together with the control rod; and at least one driven member movable together with the shift fork. The driven member is formed with a rectangular recess into which a head portion of the drive member is insertable under a certain condition so that upon selecting operation, the head portion of the drive member is put in the recess of the driven member and upon shifting operation, the head portion of the drive member abuts against one of the side walls of the recess thereby to move the driven member in a certain direction thereby completing a gear coupling.

Abstract: In an automotive manual transmission comprising a plurality of shift forks each having at its extension a recess, a plurality of pivotting levers pivotable about a common axis, a first end of each pivotting lever being received in the recess of the corresponding shift fork extension to form an articulated connection therebetween so that upon rotation of one pivotting lever about the common axis, the corresponding shift fork is operatively moved to establish a certain gear ratio of the transmission, and means engageable with a second end of each pivotting lever for selecting one of the pivotting levers and pivotally moving the selected pivotting lever about the common axis, there is provided a wear-resistant cap member which is slidably and movably put on the first end of each pivotting lever while being accommodated in the recess of the corresponding shift fork extension.

Abstract: In an automotive manual transmission comprising a common fork shaft on and along which a plurality of shift forks are slidable, a control rod rotatable about and slidable along the axis thereof which is normal to the axis of the common fork shaft, a pivotting pin extending normal to both the axes of the common fork shaft and the control rod, a plurality of pivotting levers pivotally mounted on the pivotting pin and jointly engaged at their one ends with the corresponding shift forks, a selecting head member secured to the control rod and engageable with the other end of selected one of the pivotting levers when the control rod is rotated about the axis thereof into an angular position, an interlock plate rotatably mounted on the control rod to ensure that only the selected pivotting lever is rotatable at any given time, and a supporting member removably connected to the transmission housing and mounting thereon the pivotting pin, there is proposed a positioning arrangement in which the supporting member is pr

Abstract: In an automotive manual transmission having a common fork shaft on and along which a plurality for shift forks are slidable and a control rod which is rotatable about and slidable along the axis thereof which is normal to the axis of the common fork shaft, there is provided a shaft control mechanism which converts the axial movement of the control rod to a sliding movement of selected one of the shift forks along the axis of the common fork shaft.

Abstract: In an automotive manual transmission including a control rod which, for establishing a speed change of the transmission, is rotated about its axis and then moved along the axis, there is proposed an arrangement which comprises an arm secured to the control rod, a hollow holder secured to the transmission housing and having at its side wall section a through hole, a piston axially movably received in the holder and having at its side section a recess which opens to the through hole of the holder, the piston being contactable with the top of the arm when the arm is rotated with the control rod by a predetermined degree in a direction toward the piston, a spring for biasing the piston toward the top of the arm so that upon contact of the piston with the top of the arm, the arm and thus the control rod are biased to rotate about the axis of the control rod in a direction away from the piston, a detent ball slidably received in the through hole of the holder with a portion thereof projected into the recess of the

Abstract: A shift fork in a transmission has an upwardly extending branch whose upper end is bevelled to introduce dripping lubricant to sliding surfaces of the shift fork branch in contact with a collar with which the shift fork is engaged for shifting gears in the transmission.

Abstract: In an automotive manual transmission including a common fork shaft on and along which shift forks are slidable, a control rod rotatable about and slidable along the axis thereof which is normal to the axis of the fork shaft, a pivoting pin extending normal to both the axes of the common fork shaft and the control rod, a supporting member removably connected to the transmission housing and mounting therein the pivoting pin, pivoting levers pivotally supported by the pivoting pin and jointly engaged at their one ends with the corresponding shift forks to induce sliding movements of the shift forks in response to rotational movements thereof, a selecting head member secured to the control rod to be movable therewith, the head member being brought into engagement with the other end of the selected one of the pivoting levers upon rotation of the control rod into an angular position, and an interlock plate rotatably mounted on the control rod to ensure that only the selected pivoting lever is rotatable at any given

Abstract: In a transaxle (1), a funnel-like oil pocket member (60) receives lube oil supplied from a gutter-like projection (43) formed to overlap a ring gear to collect oil sticking to a side thereof. The funnel-like member supplies lube oil to a lube oil passage (47) formed in a main shaft (18) through a hole (63) and a space (.delta.).

Abstract: Method of assembling a manual transmission of a transversely mounted engine is disclosed, which comprises (a) engaging one of the shift forks with the corresponding coupling sleeves which have been already mounted in the transmission housing; (b) rotating the shift forks about the respective axes of the coupling sleeves, while maintaining engagement with the corresponding coupling sleeves, for alignment of the hub section holes of the shift forks with one another and for alignment of the shift fork extensions for engagement with the corresponding pivoting levers; (c) passing a common fork shaft through each of the aligned hub section holes; and (d) securing the common fork shaft to the transmission housing.

Abstract: A speedometer drive worm gear has at one axial end thereof an inward flange of the thickness considerably smaller than the overall thickness of the worm gear. The speedometer drive worm gear is mounted on a differential case and held axially in place by abuttingly engaging the opposed side surfaces of the inward flange with a shoulder formed in the differential case and the inner race of a differential case bearing by way of a stopper.

Abstract: A reverse gear selector mechanism in an automotive manual transmission comprises a reverse shifter operable to directly move a reverse idler gear into predetermined shift positions when rotated by a striking lever about a pivot shaft. The reverse shifter is T-shaped in plan with a notch engaging the striking lever and a forked end straddling the reverse idler gear.

Abstract: In a transmission including a transmission housing and a clutch cover which are coupled with each other by sealingly contacting their respective mating flange portions, there is provided an air breather device which comprises a first rib formed on the transmission housing to form near the mating flange portion of the housing a first recess, a second rib formed on the clutch cover to form near the mating flange portion of the casing a second recess, the first and second ribs being sealingly contacted at their tops with each other to merge the first and second recesses to form a chamber upon coupling the transmission housing and the clutch cover, first means defining in the first and second ribs respective cuts which constitute, upon coupling the transmission housing and the clutch cover, independent openings through which the interior of the chamber is communicated with the interior of the transmission housing, and second means communicating the interior of the chamber with the outside of the transmission hous

Abstract: A clutch housing for the transmission of an automotive vehicle has an integral front cover, and a release bearing sleeve formed separately from and detachably secured to the front cover in communication with a stepped hole extending therethrough. An input shaft extends through both the stepped hole and the release bearing sleeve. The input shaft is rotatably supported by a bearing located in the stepped hole. An oil seal surrounds the input shaft and is retained within the release bearing sleeve at a location spaced axially from the bearing.