ZF 4651.252.003 SPUR GEAR for WG100 | OEM Genuine Part

Overview

The ZF 4651.252.003 SPUR GEAR is a critical power transmission component engineered specifically for the WG 100 Series transmission family. This OEM genuine part, identified by SKU 4651.252.003, operates within the gear train to transfer rotational torque from the input shaft to the intermediate shaft, ensuring precise speed reduction and load distribution. Positioned in the lower gear cluster, this spur gear meshes directly with the TRANSMISSION HOUSING assembly to maintain correct gear alignment and reduce backlash. Without this gear, the transmission cannot achieve the required gear ratios for heavy-duty industrial applications.

Symptoms of Failure

When the ZF 4651.252.003 spur gear begins to wear, operators may notice distinct failure indicators. Whining or grinding noise during gear engagement is the most common early symptom, often caused by pitting on the tooth flanks. Intermittent gear slipping under load occurs when the gear teeth lose their hardened surface, leading to reduced torque transfer. Metallic debris in the transmission fluid is a clear sign of advanced wear, as fragments from the spur gear contaminate the oil. Vibration at specific RPM ranges indicates uneven tooth wear or misalignment with the HOUSING interface.

Technical Specifications

Compatibility

This spur gear is primarily designed for the ZF WG 100 Series, but it also fits select models in the WG 180 and WG 200 families due to shared gear train architecture. Compatible transmissions include WG100, WG120, WG150, WG180, and WG200 variants manufactured after 1998. The gear interfaces with the HOUSING assembly using a precision bore and requires the correct O-RING to prevent oil bypass. Always verify your transmission serial number before ordering, as some early WG200 models use a different tooth profile.

Related Components