Nazhihui
1 / 3
| Model | 12JSD180TA |
| Brand | Fast |
| Number of Gears | 12 forward gears + 2 reverse gears |
| Shifting Mode | Manual with full synchronizer |
| Maximum Input Torque | 1800N·m |
| Adapted Vehicles | Heavy commercial vehicles (8×4 cargo trucks, 6×4 tractors); Construction machinery (Mining dump trucks, large loaders) |
These component parts are engineered to Shaanxi Fast Gear’s original specifications, exclusively for the Fast 12JSD180TA 12-speed manual transmission. Built for heavy-duty scenarios like long-haul transportation, mining, and construction, they deliver reliable performance and seamless compatibility with the transmission’s core assemblies.
Constructed from high-quality materials—clutch/transmission case parts of ductile iron, second shaft and countershaft of alloy structural steel, sealing components of wear-resistant rubber—all parts undergo professional processing. Case parts adopt precision casting, CNC machining, and leakage testing; shaft and gear parts go through forging, heat treatment, gear hobbing-grinding, and shot peening reinforcement. These processes meet the transmission’s 1800N·m max input torque and 2600rpm rated speed requirements. Strict quality inspections ensure full compliance with OEM standards.
1. Clutch and Transmission Case Assembly
| No. | Parts No. | Part Name | Qty. |
|---|---|---|---|
| 1 | Q1701032 | Small Hexagon Head Bolt | 2 |
| 3 | JS180-1701040-1 | Input Shaft Bearing Cover | 1 |
| 6 | F500A-1802191 | Skeleton Oil Seal Assembly | 1 |
| 20 | JS180-1601024-6 | Release Fork Bracket | 1 |
| 21 | JS180-1601021-6 | Shift Fork | 1 |
| 29 | A-3674-Y-20 | Clutch Housing | 1 |
| 32 | 12JSD160T-1701012-Y | Transmission Case | 1 |
2. Second Shaft Assembly
| No. | Parts No. | Part Name | Qty. |
|---|---|---|---|
| 2 | 12JS160T-1701108 | Synchronizer Sleeve | 1 |
| 8 | 12JS200T-1701105 | Second Shaft | 1 |
| 9 | 16JS200T-1701110 | Second Shaft Reverse Gear | 1 |
| 10 | 12JS200T-1701111 | Second Shaft 1st Gear | 1 |
| 16 | JS130T-1701180 | 3rd/4th Gear Synchronizer Assembly | 2 |
3. Countershaft Assembly
| No. | Parts No. | Part Name | Qty. |
|---|---|---|---|
| 3 | 12JS200T-1701048 | Countershaft | 1 |
| 4 | 12JS200T-1701050 | Countershaft 3rd Gear | 1 |
| 5 | 12JS200T-1701051 | Countershaft 4th Gear | 1 |
| 6 | 12JS200T-1701056 | Countershaft Drive Gear | 1 |
| 8 | 16JS200T-1701055 | Countershaft Square Key | 1 |
