Shaanxi Fast 12JSD180TA Transmission Parts - Input Shaft, Reverse Idler Shaft & Top Cover Assembly Components
|
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 (e.g., Sinotruk, Shaanxi Auto heavy-duty trucks) Construction machinery: Mining dump trucks, large loaders |
Product Description
These parts are engineered to Shaanxi Fast Gear’s original specs, exclusively for the 12JSD180TA 12-speed manual transmission. Built for heavy-duty scenarios like long-haul transport, mining, and construction, they ensure seamless compatibility with the three key assemblies.
Crafted from high-quality materials—alloy steel for shafts, wear-resistant alloy for shifting components, durable rubber for seals—all parts undergo precision processing (forging, heat treatment, CNC machining) to meet 1800N·m max torque and 2600rpm rated speed. Strict quality checks guarantee OEM compliance.
Input Shaft Assembly Components
Input shaft, radial ball bearing with stop groove and dust cover, gear spacer, stop ring, and flattened wire circlip—ensuring stable torque input from the engine.
Reverse Idler Shaft Assembly Components
Reverse idler shaft, idler gear, needle bearing, cup-shaped reverse washer, and slotted set screw—supporting smooth reverse gear operation.
Top Cover Assembly Components
Shift forks, fork shafts, guide blocks, steel balls, compression springs, and interlock pins—enabling accurate and responsive gear selection.
As direct-fit parts, no modification is needed for installation. Fully interchangeable with original equipment, they’re ideal for routine servicing or emergency repairs. Professional after-sales support is provided.
Detail Parts List
1、 Input Shaft Assembly

|
No. |
Parts No. |
Part Name |
Qty. |
|
1 |
16980 |
Flattened Wire Circlip for Shaft |
1 |
|
2 |
C01021 |
Stop Ring |
1 |
|
3 |
150212K |
Single-Row Radial Ball Bearing with Snap Groove andDust Cover on One Side |
1 |
|
4 |
16463 |
Gear Spacer |
1 |
|
5 |
14750 |
Stop Ring |
1 |
|
6 |
JS180A-1701030-S |
Input Shaft |
1 |
|
7 |
16566 |
Second Shaft Bushing |
1 |
2、Reverse Idler Shaft Assembly

|
No. |
Parts No. |
Part Name |
Qty. |
|
1 |
12JS160T-1701084 |
Cup-Shaped Reverse Washer |
1 |
|
2 |
12JS200T-1701083 |
Reverse ldler Gear |
1 |
|
3 |
DS100-1701085 |
Needle Bearing |
1 |
|
4 |
JS220-1701082 |
Reverse Idler Shaft |
1 |
|
5 |
Q2821212 |
Slotted Flat-End Set Screw |
1 |
3、Top Cover Assembly

|
No. |
Parts No. |
Part Name |
Qty. |
|
1 |
12_7G100BGB-T308 |
Steel Ball |
4 |
|
2 |
19_05G100BGB-T308 |
Steel Ball |
3 |
|
3 |
1634 |
Shift Fork Shaft Interlock Pin |
2 |
|
4 |
3220 |
Shift Fork Lock Screw |
3 |
|
5 |
11066 |
Stud Bolt |
4 |
|
6 |
12JS160T-1702012-Y |
Top Cover with Thread Insert Assembly |
1 |
|
7 |
12JS160T-1702050-1 |
Reverse Guide Block Assembly |
1 |
|
8 |
12JS160T-1702054 |
5th/6th Gear Guide Block |
1 |
|
9 |
12JS160T-1702055 |
Reverse Shift Fork |
1 |
|
10 |
12JS160T-1702056 |
1st/2nd Gear Shift Fork |
1 |
|
11 |
12JS160T-1702057 |
3rd/4th Gear Shift Fork |
1 |
|
12 |
12JS160T-1702058-2 |
5th/6th Gear Shift Fork |
1 |
|
13 |
12JS160T-1702059-1 |
5th/6th Gear Shift Guide Block |
1 |
|
14 |
12JS160T-1702063 |
Reverse Shift Fork Shaft |
1 |
|
15 |
12JS160T-1702064-1 |
1st/2nd/3rd/4th Gear Shift Fork Shaft |
2 |
|
16 |
12JS160T-1702066 |
5th/6th Gear Shift Fork Shaft |
1 |
|
17 |
F96085-1 |
Compression Spring |
1 |
|
18 |
F96085-1 |
Compression Spring |
3 |
|
19 |
GB889-80-M12X125 |
Hexagon Nut with Nylon Insert (M12x 125) |
1 |
|
20 |
JS100A-1702072 |
Swing Shift Head |
1 |
|
21 |
JS100A-1702073 |
Support Pin |
1 |
|
22 |
Q351B10 |
Thin Hexagon Nut |
2 |
|
23 |
Q361B10 |
Type 2 Hexagon Nut |
2 |
|
24 |
Q40112 |
Flat Washer |
1 |
|
25 |
Q40310 |
Spring Washer |
2 |
|
26 |
Q5280630 |
Elastic Cylinder Pin |
2 |
|
27 |
X-1-603 |
Hexagon Nut |
2 |
Product Advantages
Perfect OEM Compatibility
100% matched to 12JSD180TA’s original dimensions, ensuring hassle-free fit without adjustments.
Stable Power Input
Alloy steel input shaft with precision processing delivers reliable torque transmission, adapting to high-load conditions.
Smooth Reverse Operation
High-quality reverse idler shaft and gear ensure stable power output for reverse gear, reducing operational noise.
Precise Shifting Experience
Precision-machined top cover components guarantee accurate gear positioning and smooth shifting.
Easy Maintenance
Modular design allows quick replacement without disassembling the entire transmission, saving time and labor costs.
Payment & Shipping Terms
● 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

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Mr. Perry Wu International Sales Director