CONSTRUCTION
Gear Train
The transmission synchromesh mechanism is an all-speed constant mesh type.
| *1 | Input Shaft | *2 | Counter Shaft |
| *3 | Single-cone Type Synchromesh Mechanism | *4 | Reverse Synchromesh Mechanism |
| *5 | Output Shaft | *6 | 5th Gear |
| *7 | 1st Gear | *8 | Reverse Gear |
| *9 | 2nd Gear | *10 | 3rd Gear |
| *11 | 4th Gear | - | - |
| Gear | 1st, 2nd, 3rd, 4th and 5th | Reverse |
| Synchromesh Mechanism Type | Single-cone | Reverse |
Reverse Synchromesh Mechanism
The reverse synchromesh mechanism consists of 2 shifting keys, a shifting key spring and a shifting key return spring.
| *1 | Counter 5th Gear | *2 | Hub Sleeve |
| *3 | Shifting Key | *4 | Shifting Key Spring |
| *5 | Shifting Key Return Spring | *6 | Snap Ring |
OPERATION
Reverse Synchromesh Mechanism
While shifting into 5th, the 2 shifting keys move in unison with the hub sleeve (F1). With "A" acting as the fulcrum, the 2 shifting keys move to push the synchronizer ring only for the amount of the lever ratio (F2). The shift effort can be reduced only by this amount.
| *1 | Hub Sleeve | *2 | Shifting Key |
| *3 | Synchronizer Ring | - | - |
| *a | A | - | - |
|
Hub Sleeve Moving Direction | |
F1 |
|
F2 | - | - |
While shifting into reverse, the 2 shifting keys move in unison with the hub sleeve (F1). With "B" acting as the fulcrum, the 2 shifting keys move to push the synchronizer ring (F2). As a result, a brake is applied to the rotation of the counter shaft and gear noise is prevented.
| *1 | Hub Sleeve | *2 | Shifting Key |
| *3 | Synchronizer Ring | - | - |
| *a | B | - | - |
|
Hub Sleeve Moving Direction | |
F1 |
|
F2 | - | - |