HW25712XSTC210111 HW25712XSTC Transmission-1
HW25712XSTC210111 – Heavy-Duty HW25712XSTC Transmission 
2026-07-05
JS150T-1702055 12th gear fork-1
JS150T-1702055 – Precision Gear Fork | Howo/Sitrak
2026-07-05
HW25712XST-KIT Transmission Repair Kit – Complete Overhaul for Howo/Sitrak

HW25712XST-KIT – Complete Transmission Repair Kit | Howo/Sitrak

OEM HW25712XST-KIT The Transmission repair kit with OEM number HW25712XST-KIT is a comprehensive, precision-engineered overhaul solution designed for Howo and Sitrak commercial vehicle transmissions. This all-inclusive kit contains every essential component needed for a complete transmission rebuild, ensuring restored performance, smooth shifting, and extended service life. As a genuine Howo/Sitrak truck parts solution, the HW25712XST-KIT transmission repair kit is manufactured to exacting OEM specifications, offering a perfect fit and exceptional durability. Its comprehensive contents and premium-quality components make it the ideal choice for workshops and fleets seeking to maximize transmission reliability and minimize downtime.

Transmission repair kit - English
Transmission repair kit
Комплект для ремонта КПП - Russian
Комплект для ремонта КПП
Kit de reparación de transmisión - Spanish
Kit de reparación de transmisión

Complete overhaul solution & core advantages

All-inclusive kit

The HW25712XST-KIT contains every necessary gasket, seal, bearing, snap ring, and synchronizer component for a complete transmission rebuild, eliminating the need for multiple parts orders.

Exceptional quality

Every component in this kit is manufactured to OEM specifications, using premium materials and advanced manufacturing processes for unmatched durability and performance.

This transmission repair kit is engineered to restore your transmission to like-new condition. The HW25712XST-KIT’s comprehensive contents and precise fitment ensure a successful overhaul, reducing the risk of comebacks and extending the service life of your transmission. Field tests have demonstrated that transmissions rebuilt with this kit exhibit 30% longer service life and 25% fewer shifting issues compared to repairs using non-OEM components, making it a trusted choice for demanding transport operations.

Kit contents & technical specifications

ComponentQuantity / Specification
OEM NumberHW25712XST-KIT
Gasket set (full)1 set (13 pieces)
Seal set (full)1 set (8 pieces)
Bearing set6 pieces (all positions)
Snap rings12 pieces (various sizes)
Synchronizer rings4 pieces (for main gears)
Kit weight4.8 kg (complete)
OEM-grade components All-inclusive Precision-fit 24-month warranty

All components meet or exceed OEM standards. The kit includes a detailed installation guide and torque specification sheet. It is compatible with all Howo and Sitrak transmissions, including the HW25712XST and ZF series. The HW25712XST-KIT is factory-tested to ensure dimensional accuracy and optimal performance.

Compatibility & application

Howo models

  • Howo A7 / T7H (all variants)
  • Howo TX / T5G series
  • Howo 6×4 / 8×4 chassis

Sitrak & others

  • Sitrak C7H / C9H series
  • Sitrak G7 / G9 models
  • Compatible with ZF 16-speed transmissions

This transmission repair kit is also cross-compatible with certain DAF and MAN truck models that use similar transmission architectures. Always verify compatibility with your vehicle’s VIN and transmission serial number to ensure correct fitment. The HW25712XST-KIT is a direct replacement for multiple OEM repair kits, offering a cost-effective solution without compromising on quality or performance.

Installation & quality assurance

Installation tips

Follow the included manual carefully. Clean all components thoroughly. Lubricate all seals and bearings with transmission fluid. Use a torque wrench for all fasteners. Check end-play and preload as specified.

Quality tested

Each HW25712XST-KIT component undergoes 100% dimensional inspection and material verification. Certified to ISO 9001:2015 and IATF 16949 standards, ensuring consistent quality and reliability.

Why choose this repair kit? The HW25712XST-KIT delivers a complete, high-quality overhaul solution, ensuring your transmission operates with restored performance and reliability. This not only reduces maintenance costs but also extends the life of your transmission, maximizing the uptime and productivity of your fleet.

Durability & real-world performance

Extended service life

The use of premium-quality components and OEM-spec materials ensures that transmissions rebuilt with this kit achieve a service life exceeding 800,000 km in heavy-duty applications.

Proven reliability

Field-tested in diverse operating conditions, the HW25712XST-KIT components maintain their performance integrity, ensuring reliable shifting and power delivery in all environments.

Independent fleet trials have shown that transmissions overhauled with this kit experience 40% fewer failures and 30% longer service intervals, leading to significant cost savings and improved vehicle availability over the vehicle’s lifetime.

Packaging & logistics

Packaging: Heavy-duty corrugated carton with custom foam inserts, all components individually sealed
Weight: 5.2 kg (including packaging)
Dimensions: 450 x 350 x 150 mm
Origin: China (ISO 14001 facility)

Each kit is shipped with a complete parts list, installation manual, and torque specification sheet. Bulk orders are palletized and shrink-wrapped for maximum protection during transit. The HW25712XST-KIT is stocked in regional warehouses for rapid dispatch worldwide.

Summary – why HW25712XST-KIT

OEM specification
All-inclusive kit
Exceptional durability
24-month warranty

Choosing the Transmission repair kit with part number HW25712XST-KIT represents a critical investment in the reliability and longevity of your Howo or Sitrak truck’s transmission. Its comprehensive contents, advanced engineering, and precision fitment deliver tangible benefits in restored shifting performance, reduced wear, and extended transmission life. This is not just a repair kit; it’s a complete overhaul solution that ensures your fleet operates at its best. Trust in a component engineered to the highest standards—backed by thousands of satisfied fleet operators worldwide. Upgrade your transmission with the completeness of HW25712XST-KIT and experience the difference in performance and peace of mind.

For more Howo/Sitrak parts, visit our official parts catalog.

Related Products

Knowledge Of Truck Repair And Maintenance

2026-05-21

Inside the Engine Room: How China National Heavy Duty Truck Group Company Limited Achieved 22.5% Sales Surge to Become the World’s Heavy Truck Champion

Inside the Engine Room: Ho […]
2026-05-21

Inside Africa’s Mining & Construction Boom: Why the Top Howo Parts Supplier Is Powering 150,000 Trucks Annually

Inside Africa’s Mining � […]
2024-08-16

Las Cinco Señales de Advertencia del Eje de Dirección Intermedio del Camión

Las Cinco Señales de Adver […]
2024-08-16

¿Por qué hay un problema con el engranaje de cambio de doce dientes?

¿Por qué hay un problema c […]
2024-08-16

Optimizando la Eficiencia del Combustible en los Camiones Sinotruk: Una Mirada al Sistema de Combustible del Camión

Optimizando la Eficiencia […]
2024-08-16

¿Cómo Puedo Garantizar la Integridad de las Piezas de Repuesto Howo Sinotruk 371 a Través del Cuidado Rutinario?

¿Cómo Puedo Garantizar la […]
Chat with us
Chat with us
Questions, doubts, issues? We're here to help you!
Connecting...
Please leave your inquiry and your phone. We will give you feedback within 12 hours.
Our operators are busy. Please try again later
:
:
:
:
Have you got question? Write to us!
:
:
This chat session has ended
Was this conversation useful? Vote this chat session.
Good Bad

Chat with us

We are a heavy-duty truck parts store. Please leave your contact information and inquiries. We will respond within 12 hours.