ZF 4646.102.403 INPUT for WG250 | OEM Genuine Part

Overview

The ZF 4646.102.403 INPUT for WG250 is a critical OEM genuine component designed to transfer rotational force from the engine directly into the transmission gear train. Positioned at the front of the main housing assembly, this input shaft interfaces with the torque converter and planetary gear sets to modulate power delivery in heavy-duty industrial applications. The SKU 4646.102.403 ensures precise spline alignment and load distribution, making it indispensable for maintaining driveline integrity under high-torque conditions. When paired with a properly sealed TRANSMISSION HOUSING, this part guarantees consistent performance in ZF WG250 series transmissions.

Symptoms of Failure

• Transmission gear slipping under load: A worn input shaft can cause intermittent engagement, leading to power loss during acceleration or uphill operation.
• Oil leaks near the front seal area: Deterioration of the input shaft surface or bearing journal allows transmission fluid to escape, often visible as drips around the bell housing.
• Abnormal whining or grinding noises: Excessive play in the input shaft bearings produces metallic sounds, especially when shifting between forward and reverse gears.
• Vibration during torque converter lockup: Imbalance or spline wear creates noticeable shuddering at specific RPM ranges, indicating the 4646.102.403 requires immediate replacement.

Technical Specifications

Compatibility

This input shaft is engineered for the ZF WG250 series, but it also fits select models in the WG180, WG200, and WG210 families due to shared spline geometry and bearing bore dimensions. Always verify the input shaft length and pilot bearing diameter against your transmission’s serial number. For complete assembly, ensure the HOUSING and COVER are free of cracks or distortion. Secure the unit using a HEXAGON SCREW torqued to factory specifications to prevent axial play.

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