29557229 Main housing Allison spare parts

29557229 Main housing Allison spare parts

The Allison 29557229 main housing, as a core structural component of Allison transmissions, focuses on solving the core needs of load-bearing, oil sealing, and structural protection for internal transmission components. It is widely used in the entire range of Allison heavy-duty automatic transmissions and the transmission systems of various heavy-duty commercial vehicles, engineering and mining machinery. The product strictly adheres to original equipment manufacturer (OEM) production standards, from the selection of HT300 gray cast iron raw materials, precision casting, aging treatment to eliminate internal stress, five-axis precision boring, electrophoretic rust prevention treatment, and precision milling of sealing grooves, to full dimensional inspection, pressure sealing testing, and rust prevention performance testing, ensuring comprehensive quality control throughout the entire process. This eliminates problems such as housing deformation, cracking, corrosion, and oil leakage caused by casting defects, insufficient machining precision, and inadequate rust prevention treatment. It is suitable for complex operating conditions involving heavy loads, high-frequency vibration, high temperatures, and high dust levels, and complies with processing and quality standards of GB/T 9439-2010, GB/T 1184-2008, ISO 9001, and CE.

Core Technical Parameters：

– Product Model: Allison 29557229
– Product Material: Main body is precision cast from HT300 gray cast iron; surface is treated with anti-rust electrophoresis; inner wall is precision bored, with matching sealing grooves and positioning pin holes.
– Load-bearing capacity: Tensile strength ≥300MPa, hardness HB180-220
– Operating parameters: Operating temperature -40℃~180℃
– Structure type: Integrated gearbox main housing
– Accuracy parameters: Mounting surface flatness ≤ 0.015mm, positioning hole coaxiality ≤ 0.01mm, geometric tolerance IT6 grade, inner wall roughness Ra ≤ 1.6μm
– Suitable for: Allison 1000/2000/3000/4000 series heavy-duty automatic transmissions, serving as the core load-bearing and protection system for transmissions in heavy-duty trucks, construction machinery, mining machinery, and special vehicles.

We prioritize quality. Our Allison 29557229 main housing undergoes rigorous quality control, including material composition analysis, hardness testing, dimensional inspection, pressure resistance testing, and rust prevention testing, achieving a 100% factory pass rate. Whether for major equipment overhauls and replacements or bulk procurement, this product perfectly adapts to the installation requirements of all core components of the original Allison transmission, requiring no additional customization or adjustments. It effectively supports internal components, seals fluids, and protects core structures, preventing housing deformation, cracking, and fluid leakage, extending the overall service life of the transmission. It provides a solid structural guarantee for the long-term stable operation of heavy-duty equipment and is a core preferred component in the Allison parts system’s transmission structural system.

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