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| Model | 8JS85C/85E |
| Brand | Fast |
| Number of Gears | 8 forward gears + 2 reverse gears |
| Shifting Mode | Manual Transmission |
| Maximum Input Torque | 850 N.m |
| Adapted Vehicles | Suitable for harsh working conditions and high-intensity heavy-duty operations, widely applied in buses, coaches, trucks, tractors, trailers and special vehicles |
These parts are engineered exclusively for the FAST 8JS85C 8-speed manual gearbox, tailored to heavy-duty scenarios like long-haul transportation, logistics and special vehicle operations.
Crafted from premium materials—high-strength steel for shafts and gears, wear-resistant rubber for seals, and durable engineering plastics for structural components—all parts undergo professional precision processing. Key processes include forging, heat treatment, CNC machining and airtightness testing, meeting the gearbox’s 850 N.m maximum input torque requirement. Strict dimensional accuracy and performance inspections ensure full compatibility with original equipment.
Auxiliary Case Main Shaft Assembly Parts
Main shaft, synchronizer assembly, reduction gear and flange nut—core components for stable power transmission of the auxiliary case.
Left and Right Countershafts of Auxiliary Case
Welded countershafts, cylindrical roller bearings and circlips—supporting balanced torque distribution in heavy-load operations.
Auxiliary Case Housing Assembly Parts
Housing, gaskets, odometer sensor and flange plate—forming the auxiliary case’s structural protection and sealing system.
Auxiliary Case Cylinder Assembly Parts
Cylinder, piston, shift fork and O-rings—ensuring reliable range shift switching of the auxiliary case.
Direct-fit design allows hassle-free installation without modification, fully interchangeable with original parts. Ideal for routine maintenance, emergency repairs and fleet bulk procurement.
1. Auxiliary Case Main Shaft Assembly
| No. | Parts No. | Part Name | Qty. |
|---|---|---|---|
| 1 | Q43135 | Elastic Retaining Ring for Shaft | 1 |
| 3 | JS85T-1707140 | Auxiliary Case Synchronizer Assembly | 1 |
| 5 | JS85T-1707105 | Auxiliary Case Main Shaft | 1 |
| 6 | JS85E-1707121 | Auxiliary Case Main Shaft Reduction Gear | 1 |
2. Left and Right Countershafts of Auxiliary Case
| No. | Parts No. | Part Name | Qty. |
|---|---|---|---|
| 1 | NJ306EN/C3 | Cylindrical Roller Bearing | 2 |
| 3 | JS85E-1707047 | Auxiliary Case Countershaft Welded Assembly | 2 |
3. Auxiliary Case Housing Assembly
| No. | Parts No. | Part Name | Qty. |
|---|---|---|---|
| 1 | JS85T-1707016 | Auxiliary Case Housing Gasket | 1 |
| 5 | JS85T-1707015 | Auxiliary Case Housing | 1 |
| 10 | 6212N | Deep Groove Ball Bearing | 1 |
4. Auxiliary Case Cylinder Assembly
| No. | Parts No. | Part Name | Qty. |
|---|---|---|---|
| 1 | JS85T-1707067 | Auxiliary Case Shift Fork | 1 |
| 6 | JS85T-1707061 | Auxiliary Case Cylinder | 1 |
| 11 | JS85T-1707063 | Auxiliary Case Cylinder Piston | 1 |
MOQ: 1 piece
Packaging: Customizable wooden crate/carton
Delivery: 3-20 working days (express: DHL/FedEx; sea freight for bulk)
Payment: L/C, T/T, Western Union; tracking number provided in 24hrs
After-Sales Service: 24-hour technical support, global service network
