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| Specification | Details |
|---|---|
| Model | 12JSDX240T |
| Brand | Fast |
| Number of Gears | 12 forward gears + 2 reverse gears |
| Shifting Mode | Manual Transmission |
| Maximum Input Torque | 2400 N.m |
| Adapted Vehicles | Suitable for harsh working conditions and heavy-duty operations, applied to heavy-duty trucks, construction machinery, and other equipment requiring high-intensity work. |
These parts are engineered exclusively for the FAST 12JSDX240T 12-speed aluminum alloy gearbox, tailored to heavy-duty scenarios like long-haul transportation, mining, and construction.
Crafted from premium materials—high-strength steel for shafts and gears, wear-resistant rubber for seals, and durable ductile iron for covers—all parts undergo professional precision processing. Key processes include forging, heat treatment, CNC machining, and airtightness testing, meeting the gearbox's 2400N.m maximum input torque requirement. Strict dimensional accuracy and performance inspections ensure full compatibility with original equipment.
Rear cover housing, output flange, synchronizer assembly and gaskets—forming the gearbox's rear-end protection and power output support system.
Range gear cylinder, piston, O-rings and cylinder head gasket—supporting reliable range shift switching of the auxiliary case.
Main shaft rear bearing cover and oil seal—ensuring stable main shaft rotation and effective leak-proof protection.
Direct-fit design allows hassle-free installation without modification, fully interchangeable with original parts. Ideal for routine maintenance, emergency repairs, and fleet bulk procurement.
| No. | Parts No. | Part Name | Qty. |
|---|---|---|---|
| 1 | RTD-11609A-1707016 | Rear Cover Gasket | 1 |
| 2 | RTD-11609A-1707067-1 | Auxiliary Case Shift Fork | 1 |
| 3 | Q171B1250 | Hexagon Head Bolt with Hole | 2 |
| 4 | 12JSDX240T-1707047 | Auxiliary Case Extended Countershaft | 1 |
| 5 | JSD220-1707012-Y | Rear Cover Housing Assembly | 1 |
| 7 | JS220-1707060-21 | Auxiliary Case Cylinder Assembly | 1 |
| 11 | 12JSD200T-1707105-7 | Auxiliary Case Main Shaft | 1 |
| 13 | RTD-11609A-1707154 | Main Shaft Rear Bearing Cover Assembly | 1 |
| 17 | JS220-1707159-20 | Output Flange | 1 |
| 34 | 12JSD160T-1707140-2 | Synchronizer Assembly | 1 |
| No. | Parts No. | Part Name | Qty. |
|---|---|---|---|
| 1 | JS220-1707061-1 | Range Gear Shift Fork Shaft | 1 |
| 3 | JS220-1707062-1 | Range Gear Cylinder | 1 |
| 5 | 14341 | Range Gear Cylinder Piston | 1 |
| 9 | F99857-10 | Auxiliary Case Shift Cylinder Head | 1 |
| No. | Parts No. | Part Name | Qty. |
|---|---|---|---|
| 1 | RTD-11609A-1707155-5 | Main Shaft Rear Bearing Cover | 1 |
| 3 | 19109-2 | Oil Seal | 1 |
MOQ: 1 piece. Packaging: Customizable wooden crate or carton for maximum protection.
3-20 working days. Express options via DHL/FedEx; sea freight available for bulk orders.
Accepted: L/C, T/T, Western Union. Includes 24-hour technical support and tracking within 24hrs.
