ZF 4661.102.003 INPUT for WG94 | OEM Genuine Part

Overview

The ZF 4661.102.003 INPUT for WG94 is a precision-engineered input shaft assembly designed to transfer torque from the engine directly into the planetary gear set of ZF’s WG 94 Series transmissions. This OEM genuine part, identified by SKU 4661.102.003, sits at the front of the transmission housing and interfaces directly with the torque converter. It is a critical rotational component that ensures smooth power delivery and proper gear engagement. For complete assembly integrity, this input shaft works in conjunction with the 4661101006: TRANSMISSION HOUSING and the 4661301012: HOUSING, which provide the structural support and alignment necessary for long service life.

Symptoms of Failure

When the 4661.102.003 input shaft begins to wear, operators may notice several distinct performance issues. Oil leaks around the front seal area are common, as a worn shaft surface damages the sealing lip. Gear slipping under load occurs when the shaft’s splines lose their tolerance, causing intermittent engagement. Another frequent symptom is abnormal whining or grinding noises from the transmission bell housing, particularly during acceleration or deceleration. Finally, delayed or harsh shifting can indicate that the input shaft’s bearing journal has developed excessive play, affecting hydraulic pressure modulation.

Technical Specifications

Compatibility

This input shaft is specifically engineered for the ZF WG 94 Series transmission family. Based on its design and spline configuration, it is compatible with the following ZF models: WG180, WG200, WG210, and WG94 variants used in medium-duty trucks, buses, and off-highway equipment. It is also a direct replacement for earlier WG 92 series units when used with the appropriate 0631306174: CYLINDRICAL PIN for alignment. For oil circulation and cooling, the 4661301093: TUBE must be properly seated to prevent starvation of the input shaft bearings.

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