Fast 12-speed Automatic Top Cover Assembly
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Fast 12-speed Automatic Top Cover Assembly

This is the original automatic shift control top cover assembly for FAST (Shaanxi Fast Auto Drive Group) 12-speed AMT automated heavy-duty truck transmissions. It integrates electronic/pneumatic shift actuators, control valves and selector mechanisms to realize automatic main/auxiliary box shifting and high/low speed range switching under AMT system control. Made of cast aluminum alloy, it has good rigidity, vibration resistance and sealing performance, adapting to heavy-duty long-distance transport, severe vibration and temperature variation conditions, preventing oil leakage and dust ingress, ensuring stable automatic shifting function of the AMT gearbox.
Availability:
Quantity:
  • 12JSDX240A

  • Fast

Product parameters

Basic Info

    • Alias: FAST 12-speed AMT shift actuator housing, automatic gearbox upper control cover, electric-pneumatic shift top cover

  • Brand: FAST (法士特)

  • Compatible Gearbox: FAST 12-speed AMT automated heavy-duty transmissions (e.g., 12JSD AMT series)

  • Applicable Vehicles: Sinotruk HOWO, Foton Auman, Shaanxi Automobile, Dongfeng and other domestic heavy-duty trucks with FAST 12-speed AMT gearboxes

  • Category: Heavy Truck Drivetrain Parts – FAST 12-Speed AMT Automatic Gearbox Top Cover Assembly

  • Net Weight: approx. 10kg

  • Package Contents: 1 x FAST 12-speed automatic gearbox top cover assembly

  • Material: Cast aluminum alloy housing + built-in automatic shift actuators, solenoid valves, sensors, sealing gaskets



Material & Advantages


  1. Cast aluminum alloy housing, lightweight, rigid, good vibration resistance and heat dissipation

  2. Integrated automatic shift control structure, matching FAST AMT electronic control system for precise auto shifting

  3. High-performance sealing structure to prevent gearbox oil leakage, dust and water contamination

  4. OEM standard mounting dimensions for direct bolt-on replacement

  5. Fixes AMT shift jitter, shift failure, fault codes, oil leakage and abnormal range shift faults

  6. Adapted to long-distance highway heavy haulage and mixed complex road conditions



Application


For overhaul and repair of domestic heavy-duty trucks equipped with FAST 12-speed AMT automated transmissions. Replace damaged automatic top cover assemblies causing abnormal automatic shifting, error codes and oil leaks. Install new gaskets, check electric/pneumatic connections, complete AMT system adaptation and test shift function after installation.


Origin & Lead Time

In stock, delivery within 1–3 working days; bulk orders: 4–7 days; sea freight: 10–24 days


MOQ & Packing

MOQ: 1 piece
Warranty: 6 months, not covered for improper programming, water damage, overvoltage and unauthorized circuit modification
Packing: Anti-static bag + shockproof foam + reinforced export carton

About yongliwei

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Gearboxes assembly include brand ZF, Eaton, FAST, Allison, DONGFENG, DC, Benz, volvo, HOWO, WLY etc. Gearboxes parts includegear, synchronizer, PTO, housing, bearings, shaft, top cover, sensors, wireness, repair kits... etc.


Our products have been exported to more than 50 countries and regions such as Korea, Chile, Russia, Kazakhstan, USA, Ecuador, Turkey, Iran, Africa, Latin America, etc., and have been unanimously recognized by customers.


In the future, we will be committed to creating higher-end quality and more intimate service. And a more comfortable customer experience to build Yongliwei company into an auto parts supplier with excellent corporate culture, scientific development concept and continuous innovation ability.

Company information (1)

Shiyan Yongliwei Industry and Trading Co., Ltd. is a modern enterprise integrating design, development, production and sales of gearbox assembly and gearbox parts.


Our company was founded in Hubei province, China, and has been specialized the truck gearboxes in Chinese offline market for 21 years .Our parts are the leader of gearboxes area in the China now.


Our company was set up in the largest truck parts production base in the world –Shiyan city, Hubei, China, to meet the demand for products in the Asia and South American markets, a professional international trade sales team was born in Hubei in 2021.


Shiyan Yongliwei is focusing on creating high quality, high technology and high standard gearboxes and its parts.

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* 8000 square meters of large warehouse.

* A number of maritime, land, air transport international logistics companies work closely together.

* To provide you with convenient, fast and low-cost e-commerce one-stop service.


About Us
19 years experience for gearbox, 5000㎡ warehouse stocked parts, professional team and high quality after-sale service, your inquiry will be our priority.
Contact Us
Email: truckparts@yongliwei.com 
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            transmission@yongliwei.com
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WhatsApp: +86-13593740499 / +86-18807289527/+8618772950034
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