29558049 Hub, High-Range Clutch Allison spare parts

29558049 Hub, High-Range Clutch Allison spare parts

The Allison 29558049 high-end clutch hub is precisely fitted to Allison 1000/2000/3000/4000 series heavy-duty automatic transmissions, compatible with heavy-duty commercial vehicles, mining wide-body trucks, engineering dump trucks, and long-haul tractors from brands such as Mercedes-Benz, DAF, Peterbilt, and Volvo equipped with Allison transmissions. As a core support and power transfer component of the high-end clutch, it directly links with the clutch pressure plate, friction plate assembly, hydraulic actuator, and transmission main shaft. During high-low gear shifts, it quickly responds to TCM commands, achieving smooth engagement of high gears and avoiding shift shock, power interruption, and spline wear. It is especially suitable for demanding operating conditions such as heavy loads, long-distance high-speed cruising, and frequent high-low gear shifts. With original factory design dimensions and mounting hole positions with zero deviation, it is the preferred original factory replacement part for transmission overhauls and clutch package upgrades.

Core technical parameters

–Model: 29558049
– Product Name: Hub, High-Range Clutch
– Operating temperature: -40°C to +150°C (short-term peak 160°C)
– Product weight: 4.2 kg
– Product Type: Original factory-grade integral forged clutch hub, single-piece assembly; adopts an integrated structure of internal spline + external tooth groove, including hub body, precision spline teeth, friction plate positioning groove, pressure plate guide surface, sealing groove, and mounting reference surface.
– Compatible Systems: Allison 1000/2000/3000/4000 series heavy-duty automatic transmissions; high-end clutch systems compatible with heavy-duty commercial vehicles, mining trucks, engineering vehicles, and municipal vehicles; can precisely link with Allison original high-end clutch friction plates, steel plates, pistons, seals, TCM control units, and hydraulic circuits to achieve rigid power transmission in high-speed gears.
– Suitable operating conditions: long-distance heavy-load high-speed cruising, frequent high and low gear switching in mountainous areas, high-load start-up in mining areas, and high-frequency gear shifting of urban expressway buses/sanitation vehicles; can work stably in harsh environments such as high temperature (transmission oil temperature 120°C), low temperature (-40°C), high vibration, and hydraulic shock.

Product Advantages

1. Precise original factory fit, saving repair time: 100% matching Allison 29558049 original factory specifications, with zero error in splines, gears, dimensions, and mounting holes; can be replaced individually without disassembling the gearbox assembly, significantly reducing repair labor costs.
2. High-strength forging, torsional resistance and durability: The chromium-molybdenum alloy steel is integrally forged and carburized and quenched, with a torsional strength of over 1200 N·m; it can withstand heavy-load shifting impacts and long-term high-speed operation, and its service life is more than twice that of ordinary cast wheel hubs.
3. Smooth shifting and efficient transmission: The spline teeth are precision ground, and the tolerance of the friction plate positioning groove is controlled within 0.02mm; there is no uneven wear or jamming when the clutch engages/disengages, and the power transmission efficiency of high gear is as high as 98.5%; effectively reducing shifting jerks, abnormal noises and power loss.

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