29557855 Planetary Carrier Assembly Allison spare parts

29557855 Planetary Carrier Assembly Allison spare parts

Allison 29557855 is a dedicated original-grade planetary carrier assembly for Allison transmissions, compatible with Allison 1000/2000/3000/4000 series heavy-duty automatic transmissions. It can also serve as a replacement part for various construction machinery and commercial vehicle transmissions. Its core function is to support the planetary gears, connect the sun gear and the ring gear, transmit power, and facilitate gear and torque conversion. It prevents transmission jamming, power interruption, and other malfunctions, making it a crucial component for ensuring the stable operation of the transmission’s planetary gear system. It is widely used in heavy-duty scenarios such as long-distance freight, mining operations, urban public transportation, and construction projects. With its strong adaptability and smooth transmission, it is the preferred replacement part for original factory maintenance and repair, perfectly meeting the transmission requirements of AT automatic transmission planetary gear sets.

Core technical parameters

-Model: 29557855
– Product dimensions: Fully matches the original planetary carrier specifications; planetary gear mounting holes and shaft diameters are precisely accurate with no deviation.
Operating temperature: -40°C to +150°C
– Product weight: 4.8kg
– Compatible Systems: Allison 1000/2000/3000/4000 series heavy-duty automatic transmissions, also compatible with planetary gear systems of transmissions from brands such as Mercedes-Benz, DAF, and Peterbilt, meeting the planetary transmission mechanism requirements of AT automatic transmissions.
– Product components: Includes planetary carrier body, planetary gear shaft, needle roller bearing, locating pin, and locking components.
– Core Materials: The planetary carrier body is forged from high-strength alloy steel, possessing high tensile strength and strong impact resistance. The planetary gear shaft undergoes carburizing and quenching treatment, making it wear-resistant and corrosion-resistant. The needle roller bearings are made of high-carbon chromium bearing steel, offering excellent lubrication performance and capable of withstanding high-frequency transmission loads under heavy-duty conditions, preventing deformation or breakage during transmission.

Product Advantages

1. Original factory fit, wide compatibility: 100% matched with Allison transmission original factory specifications, with precise correspondence in hole positions, dimensions, and transmission parameters. It can also be used interchangeably with planetary carrier assemblies of multiple brands and related models of transmissions. No modification to the transmission structure is required; it can be used directly by replacement. Its compatibility covers the transmission needs of various scenarios such as commercial vehicles, construction machinery, and special vehicles.
2. Precision transmission, smooth and efficient: Utilizing high-strength alloy forging and precision machining processes, the planetary carrier, planetary gears, and bearings have precise fit clearances, resulting in high transmission efficiency. This effectively reduces power loss and transmission jerking, avoiding abnormal noises and jamming caused by meshing deviations. It ensures smooth gear shifting, aligns with the structural advantages of coaxial transmission in planetary gear sets, and achieves smooth speed and torque changes, improving the driving experience and equipment operating efficiency.
3. Durable, stable and reliable: The alloy material is tensile and impact resistant, wear resistant and corrosion resistant. The planetary gear shaft is carburized and quenched, resulting in a long service life. It can withstand heavy loads and high-frequency transmission loads. It has been verified by heavy-load cyclic working conditions such as mining and long-distance freight transportation. It is not prone to deformation, breakage and wear problems, which can effectively extend the maintenance cycle of the gearbox, reduce maintenance costs, adapt to various heavy-load and complex use scenarios, and ensure long-term stable transmission of the planetary gear set.

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