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FAST Transmission

Home / Products / DONGFENG POWERTRAIN / FAST Transmission / Auxiliary Box Main Shaft OE 12JSD200T-1707105 for FAST Transmissions Parts

Auxiliary Box Main Shaft OE 12JSD200T-1707105 for FAST Transmissions Parts

This is a genuine auxiliary box main shaft (OE:12JSD200T-1707105) specifically engineered for heavy-duty trucks equipped with FAST 12JSD200T series transmissions, serving as the critical power transfer component in the auxiliary gearbox. It features precision-machined splines and bearing surfaces for a perfect fit with the transmission assembly, requiring no modification during installation. Constructed from high-strength forged steel with precision heat treatment, this shaft 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.

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PRODUCT DESCRIPTION

Forged Steel Construction & Precision Machined Splines

This main shaft OE 12JSD200T-1707105 is manufactured to exact FAST transmission specifications, using high-strength forged steel for exceptional durability and impact resistance. The shaft undergoes precision CNC machining for perfectly formed splines and bearing journals, ensuring smooth power transfer and optimal component engagement. Heat treatment hardens the shaft surfaces, significantly improving wear resistance and extending service life. The 1:1 OEM design guarantees a seamless fit with the auxiliary box assembly, restoring factory gearbox performance and efficiency.

Worn or Damaged Auxiliary Box Shafts

Truck operators often face issues with failing main shafts, including worn splines causing power loss, damaged bearing journals leading to noise/vibration, and shaft bending under heavy loads. Low-quality shafts can fail under extreme torque, leading to costly transmission repairs and downtime. By choosing the genuine OE 12JSD200T-1707105 shaft, you eliminate these problems, restoring smooth, reliable power transfer and protecting your transmission system from further damage.

OEM Quality & Rigorous Load Testing

As a critical transmission component, this main shaft 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 surfaces ensure consistent component 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.

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 main shaft OE 12JSD200T-1707105 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

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

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%.