ZF 4646.102.017 INPUT for WG251 | OEM Genuine Part

Overview

The ZF 4646.102.017 INPUT for WG251 is a critical drivetrain component engineered to transfer rotational force from the torque converter directly into the planetary gear sets of your ZF transmission. Positioned at the front of the gearbox housing, this OEM genuine input shaft ensures precise alignment and torque distribution under heavy-duty cycles. The SKU 4646.102.017 is specifically machined to interface seamlessly with the TRANSMISSION HOUSING and the HOUSING assembly, forming the backbone of the WG 251 Series power flow. Without this part, the transmission cannot engage forward or reverse gears reliably.

Symptoms of Failure

When the ZF 4646.102.017 INPUT begins to wear, operators often notice delayed engagement when shifting from neutral to drive—a classic sign of spline wear or bearing surface degradation. Another frequent complaint is intermittent gear slipping under load, particularly during uphill hauls or sudden acceleration. You may also detect metallic debris in the transmission fluid during routine changes, indicating that the input shaft’s hardened surface is flaking. Finally, persistent oil leaks around the front seal area can occur if the shaft’s journal becomes scored, allowing fluid to bypass the COVER seal.

Technical Specifications

Compatibility

This 4646.102.017 INPUT is designed primarily for the ZF WG 251 Series transmission family. Based on its spline geometry and shaft length, it is also compatible with select models in the WG180, WG200, and WG250 series that share the same input interface. Always verify the spline count and pilot bearing bore before installation. For a complete rebuild, consider pairing this input shaft with a new CAP SCREW kit to secure the assembly to the torque converter hub.

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