ZF 4166.236.113 INPUT SHAFT for WG200 | OEM Genuine Part

Overview

The ZF 4166.236.113 Input Shaft is a critical torque-transfer component engineered specifically for the WG 200 series of heavy-duty powershift transmissions. This OEM genuine part serves as the primary rotational interface between the engine flywheel and the transmission’s planetary gear sets, converting engine power into controlled hydraulic and mechanical motion. Precision-machined from high-tensile alloy steel, the SKU 4166.236.113 ensures minimal torsional deflection under extreme load conditions. When installed within the main gearbox housing, this shaft aligns directly with the TRANSMISSION HOUSING (4644101177) and the TRANSMISSION HOUSING (4644301229), forming the central rotating assembly that drives all forward and reverse gears.

Symptoms of Failure

• Persistent oil seepage at the front seal area: A worn input shaft bearing journal or spline wear can cause the shaft to wobble, breaking the seal integrity and leading to gradual ATF loss around the bell housing.
• Hard shifting or gear engagement delay: When the input shaft splines become stripped or fatigued, torque delivery becomes intermittent, resulting in a noticeable lag when shifting from neutral to drive or reverse.
• Vibration during acceleration: A bent or unbalanced input shaft generates low-frequency shuddering that intensifies under load, often misdiagnosed as a torque converter issue.
• Metallic debris in the transmission pan: Flaking or spalling on the shaft’s hardened surface produces fine steel particles that contaminate the hydraulic system, accelerating wear on the GROOVED STUD (0631311009) and other internal components.

Technical Specifications

Compatibility

This input shaft is designed for the ZF WG 200 series transmissions, including the WG180, WG200, and WG210 variants commonly found in municipal trucks, airport ground support equipment, and medium-duty construction vehicles. It directly replaces the original shaft in any WG200-series gearbox that utilizes a 32mm spline input. The shaft interfaces with the TYPE PLATE (0730365067) for correct identification and must be torqued to factory specifications when mated to the housing assembly. Always verify your transmission’s serial number against the OEM parts catalog before ordering.

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