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FAST Transmission

Home / Products / DONGFENG POWERTRAIN / FAST Transmission / Countershaft 1st Gear OE 12JS200T-1701111 for FAST Transmissions Parts

Countershaft 1st Gear OE 12JS200T-1701111 for FAST Transmissions Parts

This is a genuine countershaft 1st gear (OE:12JS200T-1701111) specifically engineered for heavy-duty trucks equipped with FAST 12JSD200T series transmissions, serving as the critical 1st-speed gear on the countershaft assembly. It features precision-machined gear teeth and internal splines for a perfect fit with the transmission countershaft, 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.

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PRODUCT DESCRIPTION

Forged Steel Construction & Precision Machined Gear Teeth

This 1st gear OE 12JS200T-1701111 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 splines, ensuring smooth, quiet engagement 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 countershaft assembly, restoring factory gearbox performance and efficiency.

Worn or Damaged 1st Gear

Truck operators often face issues with failing 1st gears, including worn or chipped teeth causing power loss, difficulty shifting into low gear, and noise/vibration from the transmission. Low-quality gears can fail under heavy starting loads, leading to costly gearbox repairs and downtime. By choosing the genuine OE 12JS200T-1701111 gear, you eliminate these problems, restoring smooth, reliable low-speed operation and protecting your transmission from further damage.

OEM Quality & Rigorous Load Testing

As a critical transmission component, this countershaft 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.

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 1st gear OE 12JS200T-1701111 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%.