ZF 0631.329.116 SPRING PIN for WG181 | OEM Genuine Part

Overview

The ZF 0631.329.116 SPRING PIN is a critical retention component engineered specifically for the WG 181 series transmission. This OEM genuine part functions as a precision alignment and fastening element, securing internal assemblies within the gear train to prevent axial displacement during high-torque operation. Positioned within the shift mechanism and clutch pack housing, the spring pin (SKU: 0631.329.116) absorbs shear loads while maintaining consistent tension between mating surfaces. Its installation is essential for maintaining the structural integrity of the 4644101047: TRANSMISSION HOUSING and the 4644301380: HOUSING assembly, ensuring that all driveline components remain correctly indexed under operational stress.

Symptoms of Failure

• Erratic gear engagement or delayed shifting – A worn spring pin allows the shift rail to drift, causing hesitation when selecting forward or reverse gears.
• Metallic rattling from the transmission bell housing – Loose spring pins create audible vibration as the 4644301189: THREADED BUSH loses its positional lock.
• Intermittent loss of hydraulic pressure – A fractured pin can obstruct oil galleries, leading to clutch slip and overheating under load.
• Visible oil seepage around the shift shaft bore – Misalignment caused by a failed spring pin compromises the seal between the housing and the 0730365067: TYPE PLATE.

Technical Specifications

Compatibility

This spring pin is a direct-fit OEM component for the ZF WG 181 series transmission. It is also compatible with the WG 180, WG 200, and WG 210 series where the shift rail retention system uses identical 8 mm spring pin bores. Always verify the 4644301161: COVER PLATE and 0631311009: GROOVED STUD condition when replacing this pin, as wear on those components accelerates spring pin fatigue.

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