FAST Transmission

FAST Transmission

Home / Products / DONGFENG POWERTRAIN / FAST Transmission / Auxiliary Box Main Shaft Reduction Gear OE 12JSD200T-1707106 for FAST Transmissions Parts
Side View Auxiliary Box Reduction Gear OE 12JSD200T-1707106 for FAST Transmission
Internal Spline Detail Reduction Gear OE 12JSD200T-1707106 for FAST Transmission
Front View Auxiliary Box Reduction Gear OE 12JSD200T-1707106 for FAST Transmission
Packaging View Auxiliary Box Reduction Gear OE 12JSD200T-1707106 for FAST Transmission
Side View Auxiliary Box Reduction Gear OE 12JSD200T-1707106 for FAST Transmission
Internal Spline Detail Reduction Gear OE 12JSD200T-1707106 for FAST Transmission
Front View Auxiliary Box Reduction Gear OE 12JSD200T-1707106 for FAST Transmission
Packaging View Auxiliary Box Reduction Gear OE 12JSD200T-1707106 for FAST Transmission

Auxiliary Box Main Shaft Reduction Gear OE 12JSD200T-1707106 for FAST Transmissions Parts

This is a genuine auxiliary box main shaft reduction gear (OE:12JSD200T-1707106) specifically engineered for heavy-duty trucks equipped with FAST transmissions, serving as a critical power transfer component in the auxiliary gearbox. It features precision-machined gear teeth and internal splines for a perfect fit with the transmission assembly, requiring no modification during installation. Constructed from high-strength forged steel with precision heat treatment, this gear meets OEM quality standards. Third-party durability testing confirms it withstands extreme torque loads, impacts, and continuous use, making it the ideal replacement to restore your truck’s gearbox performance and reliability.

Product Attributes

Attribute NameAttribute Content
OE Number12JSD200T-1707106
Compatible ModelsHeavy-duty trucks with FAST 12JSD200T series transmissions
Product NameAuxiliary Box Main Shaft Reduction Gear / Gearbox Reduction Gear
MaterialHigh-strength forged steel, precision heat-treated
ColorMetallic gray (machined steel)
FunctionReduces speed and increases torque in the auxiliary gearbox, transmits power to the main shaft
Key FeaturesPrecision-machined gear teeth, heat-treated surface, optimized spline fit, wear-resistant finish
Installation MethodDirect fit to FAST transmission auxiliary box
CertificationGenuine OEM FAST Transmission Component



PRODUCT DESCRIPTION

Precision Machined Gear Teeth Detail Reduction Gear OE 12JSD200T-1707106 for FAST Transmission
01

Forged Steel Construction & Precision Machined Gear Teeth

This reduction gear OE 12JSD200T-1707106 is manufactured to exact FAST transmission specifications, using high-strength forged steel for exceptional durability and impact resistance. The gear undergoes precision CNC machining for perfectly formed gear teeth and internal splines, ensuring smooth, quiet operation and optimal power transfer. Heat treatment hardens the gear surfaces, significantly improving wear resistance and extending service life. The 1:1 OEM design guarantees a seamless fit with the auxiliary box, restoring factory gearbox performance and efficiency.


Angled View Auxiliary Box Reduction Gear OE 12JSD200T-1707106 for FAST Transmission
02

Worn or Damaged Auxiliary Box Gears

Truck operators often face issues with failing reduction gears, including worn or chipped teeth causing power loss, noise, and vibration, damaged splines preventing proper engagement, and gearbox performance degradation. Low-quality gears can fail under heavy loads, leading to costly transmission repairs and downtime. By choosing the genuine OE 12JSD200T-1707106 gear, you eliminate these problems, restoring smooth, reliable power transfer and protecting your transmission system from further damage.


Auxiliary Box Fit Surface Detail Reduction Gear OE 12JSD200T-1707106 for FAST Transmission
03

OEM Quality & Rigorous Load Testing

As a critical transmission component, this reduction gear complies with strict OEM quality standards and has passed comprehensive torque and fatigue testing. Test data shows the forged steel construction maintains structural integrity under extreme operating loads, the precision-machined teeth ensure consistent contact, and heat treatment prevents premature wear. Each unit undergoes dimensional inspection before leaving the factory, guaranteeing exact alignment with your FAST transmission. Backed by OEM traceability codes, this product ensures 100% authenticity and reliable operation.


OEM Part Number Label Detail Reduction Gear OE 12JSD200T-1707106 for FAST Transmission
04

Genuine Supply & Direct Installation

We are an authorized supplier of genuine OEM FAST transmission components, providing gearbox system parts to fleet operators, repair shops, and distributors worldwide. This reduction gear OE 12JSD200T-1707106 is supplied in protective packaging to prevent damage, ensuring it arrives ready for installation. Its direct-fit design allows for straightforward installation without custom modifications, reducing vehicle downtime. The durable forged steel construction ensures long service life, minimizing future maintenance costs. We offer a 24-month quality warranty and dedicated technical support for installation guidance.


TECHNICAL SUPPORT

1. Accessories selection consultation

- Provide ** intelligent selection tools ** (such as parts matching query system), input the vehicle model VIN code or engine model to match the corresponding parts number, reducing the selection error rate.


The technical team is available online 7×12 hours to answer technical questions about accessories (such as material compatibility and installation processes).


2. Customized development support

We offer specialized R&D services for special market demands (such as heat dissipation accessories for high-temperature regions in the Middle East and dedicated suspension components for road conditions in Africa), and complete sample delivery within six weeks.


3. Training and Technical materials

Provide remote/on-site training for the customer's after-sales team (such as diagnosis of electrical control accessories and DPF regeneration operation), along with multilingual versions of the "Accessories Installation Manual" and "Troubleshooting Guide".


4. Quality Traceability and Improvement

Through the QR code traceability system (one product, one code), track the production batch of accessories and the source of raw materials, respond quickly to quality complaints and initiate improvement processes.

AFTER-SALES AND LOGISTICS SUPPORT

After-sales service

After-sales service

Quality Assurance Policy


-The warranty period for original factory parts is 12 months (counting from the date of signature for receipt), covering material defects, process issues, and man-made damage.


- Provide "Localized Express repair Service" : Cooperate with third-party repair networks in markets such as Southeast Asia and the Middle East, and deliver emergency parts to designated repair points within 4 hours.


Return and Exchange Process


-The customer is required to submit the test report (such as a third-party appraisal) within the warranty period. After confirmation by Dongfeng, a reissue or refund will be arranged within 5 working days.

Logistics support

Logistics support

Warehouse Layout


-Five major regional accessory centers have been established globally (Southeast Asia, the Middle East, Africa, South America, and Europe) to achieve "next-day delivery" for mainstream accessories (covering customers within the regions).


Emergency Logistics Plan


-Emergency parts can be directly delivered within 48 hours via the "Dongfeng Exclusive Aviation Special Line" (such as engine ECU, brake valves and other key components).


Packaging Optimization

-Use shockproof and moisture-proof packaging (such as honeycomb cartons + pearl cotton), and reinforce fragile parts (such as glass, sensors), keeping the damage rate within 0.5%.