CONSTRUCTION
Gear Train
The transmission synchromesh mechanism is an all-speed constant mesh type.
| *1 | Input Shaft | *2 | 4th Gear |
| *3 | 3rd Gear | *4 | 2nd Gear |
| *5 | Reverse Gear | *6 | 1st Gear |
| *7 | 5th Gear | *8 | Output Shaft |
| *9 | Counter Shaft | *10 | Single-cone Type Synchromesh Mechanism |
| *11 | Triple-cone Type Synchromesh Mechanism | *12 | Reverse Synchromesh Mechanism |
| Gear | 1st | 2nd | 3rd, 4th and 5th | Reverse |
| Synchromesh Mechanism Type | Single-cone | Triple-cone | 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 | Hub Sleeve Moving Direction |
| *3 | Shifting Key |
| *4 | Synchronizer Ring |
While shifting into reverse, 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 | Hub Sleeve Moving Direction |
| *3 | Shifting Key |
| *4 | Synchronizer Ring |