29557242 kit-pinion, gear, sp Allison spare parts

29557242 kit-pinion, gear, sp Allison spare parts

The Allison 29557242 kit-pinion, gear, sp is a core transmission component for Allison automatic transmissions. It is designed for heavy-duty transmissions such as the 3000/4000 series, HD/B500, 4000RDS, and T400, and is used for power transmission of planetary gear sets. It ensures stable torque output and smooth shifting, and is a key power kit for the repair and original equipment replacement of transmissions in commercial vehicles and construction machinery.

This product is precision forged from high-strength alloy steel and undergoes carburizing, quenching, high-precision grinding, and dynamic balancing processes. The tooth surface hardness reaches HRC 58–62, exhibiting excellent fatigue resistance and impact resistance. It can operate stably under heavy-load conditions with high torque, high speed, and frequent gear shifting, effectively reducing gear wear, abnormal noise, and transmission loss, and extending the overall life of the gearbox.

Core technical parameters:

Part Number: 29557242
Product Type: Small Gear Kit (Planetary Small Gear + Matching Components)
Compatible models: Allison 3000/4000 series, HD/B500, 4000RDS, T400, MD3060, HD4060, etc.
Installation location: planetary gear set of the gearbox
Material: High-strength alloy structural steel
Tooth surface hardness: HRC 58–62
Accuracy class: ISO 5 (OEM original standard)
Torque capacity: ≥2500 N·m
Applicable speed: 0–4500 rpm
Operating temperature: -30℃~150℃
Lubrication requirements: Allison genuine transmission fluid
Service life: ≥12000 working hours

Product advantages:

Original factory specifications: 1:1 matching Allison original design, no modification required for installation, easy replacement.
Superior durability: High-hardness tooth surface, resistant to pitting and scuffing, not easily deformed or broken under heavy loads.
High-efficiency transmission: High-precision meshing, power transmission efficiency ≥98%, reducing power loss.
Stable operation: Dynamic balancing calibration reduces vibration and noise, and improves shift smoothness.
Wide range of applications: Suitable for heavy-duty applications such as heavy trucks, buses, engineering equipment, and oilfield machinery.
Quality Assurance: Passed Allison original factory bench testing, performance and reliability are equivalent to original factory parts.

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