ZF 4646.102.400 INPUT for WG250 | OEM Genuine Part

Overview

The ZF 4646.102.400 INPUT for WG250 is a precision-machined input shaft assembly that serves as the primary torque transfer interface between the engine and the transmission gearset. Located at the front of the WG250 series housing, this OEM genuine part (SKU: 4646.102.400) directly engages the torque converter hub and drives the planetary gear sets. As a critical rotating component, it must withstand high torsional loads and maintain exacting alignment with the TRANSMISSION HOUSING to prevent premature wear. This genuine ZF part ensures factory-specified spline engagement and axial play tolerances for long service life in heavy-duty industrial applications.

Symptoms of Failure

• Torque converter slipping or delayed engagement – Worn input shaft splines cause intermittent power transfer, often misdiagnosed as a failing converter.
• Oil leaks at the front seal area – A scored or worn input shaft surface damages the seal, leading to gradual ATF loss and potential overheating.
• Vibration during gear shifts – Bearing journal wear on the 4646.102.400 creates radial play, transmitting harmonics through the driveline.
• Metallic debris in transmission fluid – Flaking from the hardened shaft surface indicates advanced fatigue, requiring immediate replacement.

Technical Specifications

Compatibility

This ZF 4646.102.400 INPUT is specifically designed for the WG250 series transmissions. It also fits select variants of the WG180 and WG200 models when used with the corresponding HOUSING and COVER. For proper installation, always pair this input shaft with the correct HEXAGON SCREW torque specifications. Verify your transmission serial number against ZF application charts to confirm fitment for WG250, WG180, or WG200 assemblies.

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