Shift Mechanism
- gear selector fork
- gear selector
- -
- flange
- lever
- link arm
- mechanical cable for lateral movement
- mechanical cable for longitudinal movement
- gear selector lever
- lever for lateral movement
- input gear selector rod
- twist piece
- ball limiter
- lever for longitudinal movement
- selector pin
- spring-loaded back-up (reverse) inhibitor.
The lever for lateral movement is secured to the outside of the input gear selector rod, on which the gear selector and gearshift gate are positioned. The selector pin, which is on the shaft/gear in the transmission housing. It engages and disengages the gears. The shaft/gear and lever are connected to the gear selector lever by mechanical cables.
When the gear selector lever is moved to the side, the outer lever on the gear selector assembly converts this movement to a pulling-sliding movement in the mechanical cable. If the gear selector lever is moved longitudinally however, the second cable is affected directly by the gear selector lever.
The lever for lateral movement acts on the input gear selector rod. At the other end of the gear selector rod there is a spring-loaded neutral return gate. The neutral return gate attempts to engage the neutral position between gears 3rd and 4th gears (when no gear is engaged).
The lever for longitudinal movement is secured to a shaft which is connected to the selector pin. The selector pin acts on the gear selector. The gear selector acts on the flanges and gear selector forks for each gear. These in turn act on the coupling sleeves for the various idler wheels.
When the gear selector lever is moved to the side, the neutral return gate will turn the gear selector to the correct position. When the gear selector lever is moved longitudinally, the gear selector bevel arm and selector pin will act on the gear selector so that the selector fork moves.
Example
When the gear selector lever is moved forwards towards 1st gear, this creates a dragging force in the mechanical cable which turns the lever for longitudinal movement. The gear selector bevel arm will then act on the selector pin and therefore the gear selector so that the lever for 1st and 2nd gear moves in the same direction. The jointed lever then moves the gear selector fork in the opposition direction and engages the synchronizing sleeve with the idler wheel for 1st gear.
When other gears are engaged, this works in a similar way. The gearshift gate then turns the gear selector to the correct position. The gear selector then directly (5th/back-up (reverse) gear) or via another component (other gears) moves the relevant gear selector fork sideways.