ZF12 speed 12AS2540TO Gearbox Assembly

12AS2540TO is a ZF AStronic series 12-speed automated manual (AMT) heavy-duty truck transmission assembly, designed for high-horsepower long-haul heavy tractor trucks. It has 12 forward gears + 2 reverse gears, intelligent electronic automated shift control, helical gear structure, with a maximum input torque of 2500 N·m, and optional hydraulic retarder and multiple PTO configurations. It adapts to mountain climbing, highway long-distance transport and heavy cargo hauling, balancing low-speed climbing torque and high-speed fuel efficiency, solving common faults such as abnormal shifting, oil leakage, synchronizer damage, overheating and electronic control system failure.

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Model:
12AS2540TO
Brand:
ZF

Product Description

Product parameters

Basic Info

Model: 12AS2540TO (ZF AStronic series)
Brand: ZF (ZF Friedrichshafen AG)
Structure: 12 forward gears + 2 reverse gears, AMT automated manual transmission, helical gears, electronic shift control system, optional hydraulic retarder
Max Rated Torque: 2500 N·m
Gear Ratios: 1st:12.29, 2nd:9.59, 3rd:7.41, 4th:5.78, 5th:4.57, 6th:3.56, 7th:2.69, 8th:2.10, 9th:1.62, 10th:1.27, 11th:1.00, 12th:0.78 (overdrive); Reverse 1:11.38, Reverse 2:8.88
Weight: approx. 268kg
Oil Capacity: approx. 13L, specified ZF heavy-duty transmission fluid
Applicable Vehicles: MAN, DAF, IVECO, Sinotruk, FAW J7 and other high-horsepower long-haul heavy-duty tractor trucks
Category: Heavy Truck Drivetrain Parts – 12-Speed AMT Transmission Assembly
Material: Reinforced cast aluminum/iron housing, high-alloy steel helical gear sets, synchronizer assemblies, electronic shift actuator, TCU control unit, bearings, oil seals

Material & Advantages

AStronic intelligent 12-speed AMT system, adaptive automatic shifting, reduces driver fatigue and optimizes fuel economy for long-haul transport
Precision fine-pitch helical gears, low noise and vibration, high durability under continuous heavy-load and bumpy road conditions
Optional hydraulic retarder, providing strong auxiliary braking, greatly improving mountain route driving safety
Modular structure with multiple PTO interfaces, adaptable to special vocational vehicles such as concrete mixers, tankers and dump trucks
Optimized cooling system, stable thermal performance for full-day long-distance transport cycles
Standard mounting interface compatible with mainstream heavy truck chassis, supports ZF professional diagnosis, calibration and maintenance

Application

For full transmission overhaul and replacement of high-horsepower long-haul heavy trucks. Confirm bell housing, input shaft spline, flange and electrical connector specifications before installation; fill with specified ZF gearbox oil; complete TCU adaptive learning and retarder calibration if applicable; test shift function, retarder operation and check for oil leaks and abnormal noise before formal operation. Follow official ZF maintenance schedules for fluid replacement and inspection.

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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