ZF 4651.102.003 INPUT for WG100 | OEM Genuine Part

Overview

The ZF 4651.102.003 INPUT for WG100 is a critical OEM genuine component engineered to manage torque transfer from the engine to the planetary gearset within the WG 100 series transmission. This input shaft assembly, identified by SKU 4651.102.003, serves as the primary rotational interface, ensuring precise alignment and load distribution during high-torque operations. It interfaces directly with the TRANSMISSION HOUSING to maintain structural integrity under heavy-duty cycles. Without this part, the transmission cannot initiate power flow, making it essential for drivetrain reliability in commercial vehicles and industrial machinery.

Symptoms of Failure

• Persistent oil seepage near the bell housing: A worn input shaft seal or surface scoring allows transmission fluid to escape, often visible as drips after prolonged operation.
• Audible grinding or whining during gear engagement: Deteriorated splines or bearing surfaces on the input shaft cause metal-on-metal contact, producing distinct noises under load.
• Intermittent gear slippage under acceleration: When the input shaft loses its precise fit within the HOUSING, torque transfer becomes erratic, leading to delayed or incomplete gear shifts.
• Vibration at specific RPM ranges: Imbalance or wear in the input shaft assembly creates harmonic vibrations that resonate through the driveline, worsening with speed.

Technical Specifications

Compatibility

This input shaft is specifically designed for the WG 100 Series transmission family, including models such as WG180, WG200, and WG250. It also fits select variants of the WG 150 series when used with the correct O-RING for sealing. For applications requiring a different housing configuration, verify compatibility with the HOUSING assembly to ensure proper spline engagement and axial clearance. Always cross-reference your transmission serial number before installation.

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