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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 assembly calibration, meeting the gearbox’s 850 N.m maximum input torque requirement. Strict dimensional accuracy and performance inspections ensure full compatibility with original equipment.
Input Shaft Assembly Parts: Input shaft, input shaft gear, deep groove ball bearing and spacers—core components for stable power transmission from the engine to the gearbox.
Reverse Idler Shaft Assembly Parts: Reverse idler shaft, reverse idler gear, needle bearing and thrust washers—ensuring reliable and smooth reverse gear operation.
Top Cover Assembly Parts: Shift forks, shift fork shafts, pressure switches and steel balls—supporting accurate gear selection and stable shifting control.
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. Input Shaft Assembly
| No. | Parts No. | Part Name | Qty. |
|---|---|---|---|
| 1 | Q43150 | Elastic Wire Circlip for Shaft | 1 |
| 2 | Q43390 | Flattened Wire Circlip for Shaft | 1 |
| 3 | 6210-ZNB | Deep Groove Ball Bearing | 1 |
| 4 | JS125T-1701028 | Input Shaft Gear Spacer | 1 |
| 5 | Q43460 | Flattened Wire Circlip for Hole | 1 |
| 6 | JS85E-1701031 | Input Shaft Gear | 1 |
| 7 | JS85T-1701030 | Input Shaft | 1 |
| 8 | JS125T-1701026 | Second Shaft Bushing | 1 |
2. Reverse Idler Shaft Assembly
| No. | Parts No. | Part Name | Qty. |
|---|---|---|---|
| 1 | GB/T889.2 | Hexagon Nut with Nylon Insert | 2 |
| 2 | 14283 | Reverse Idler Shaft Washer | 2 |
| 3 | 14282 | Reverse Thrust Washer | 2 |
| 4 | 14287 | Needle Bearing | 2 |
| 5 | JS85E-1701082 | Reverse Idler Gear | 2 |
| 6 | JS85T-1701083 | Reverse Idler Shaft | 2 |
| 7 | Q2821212 | Slotted Flat-End Set Screw | 2 |
3. Top Cover Assembly
| No. | Parts No. | Part Name | Qty. |
|---|---|---|---|
| 1 | 0041KS-1 | Reverse Gear Pressure Switch | 1 |
| 9 | JS85T-1702054 | Reverse Shift Fork | 1 |
| 12 | JS85A-1702057 | 3rd/4th Gear Shift Fork | 1 |
| 13 | JS85E-1702056 | 1st/2nd Gear Shift Fork | 1 |
| 20 | JS85T-1702015-1-Y | Top Cover | 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
