ZF 4644.102.113 INPUT for WG201 | OEM Genuine Part

Overview

The ZF 4644.102.113 INPUT for WG201 is a critical drivetrain component engineered to transfer torque from the engine directly into the transmission gear set. As an OEM genuine part, this input shaft assembly ensures precise alignment and minimal rotational play within the WG 201 Series housing. The SKU 4644.102.113 is specifically designed to interface with the clutch pack and planetary gears, making it the primary point of power entry. When installed alongside a robust TRANSMISSION HOUSING (4644101160), it maintains the structural integrity required for heavy-duty industrial applications.

Symptoms of Failure

• Oil leaks near the bell housing: A worn input shaft seal or damaged splines can allow transmission fluid to escape, leaving puddles under the vehicle.
• Gear slipping under load: When the input shaft loses its hardened surface, it fails to engage the clutch discs properly, causing erratic power delivery.
• Vibration during acceleration: Bent or worn input shaft bearings produce a distinct shudder that intensifies as RPMs increase.
• Difficulty shifting into gear: A stripped or galled input shaft prevents smooth engagement, often requiring excessive force on the shifter.

Technical Specifications

Compatibility

This input shaft is engineered for the ZF WG 201 Series, but it also fits select models in the WG180 and WG200 families due to shared spline geometry. It is a direct replacement for transmissions used in municipal trucks, construction loaders, and agricultural tractors. For proper sealing, always pair this part with a new O-RING (0634306198) and verify housing alignment using a TRANSMISSION HOUSING (4644301323). The assembly also requires a THREADED BUSH (4644301189) to secure the input shaft bearing preload, and a SCREW PLUG (4475280043) to seal the hydraulic circuit.

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