ZF 4651.351.019 SPUR GEAR for WG100 | OEM Genuine Part

Overview

The ZF 4651.351.019 SPUR GEAR is a critical power transmission component engineered specifically for the WG 100 Series transmission. This OEM genuine part, identified by SKU 4651.351.019, functions as a precision-machined gear that transfers rotational force between parallel shafts within the gear train assembly. Positioned within the intermediate shaft cluster, this spur gear directly engages with the main drive gear to modulate torque distribution during shifting operations. Its hardened tooth profile ensures minimal backlash and consistent load handling under high-stress industrial applications. When paired with a robust TRANSMISSION HOUSING, this component maintains exacting alignment to prevent premature wear across the entire driveline.

Symptoms of Failure

• Audible gear whine during acceleration: A high-pitched metallic noise from the transmission housing often indicates worn tooth flanks on the spur gear, signaling imminent failure.
• Intermittent gear slipping under load: When the 4651.351.019 spur gear loses tooth profile integrity, you may experience sudden loss of torque transfer, particularly during uphill operation or heavy hauling.
• Metallic debris in transmission fluid: Flakes or fine metal particles found during routine oil changes point to spalling on the spur gear surface, requiring immediate replacement.
• Vibration at specific RPM ranges: A rhythmic shudder felt through the chassis at steady speeds indicates uneven wear on the gear teeth, often exacerbated by a failing O-RING that allows contamination ingress.

Technical Specifications

Compatibility

This spur gear is primarily designed for the ZF WG 100 Series transmission family. Based on its tooth geometry and shaft interface, it is also compatible with the following ZF models: WG 100, WG 120, WG 150, and WG 180. For WG 200 and WG 250 series applications, verify shaft center distances before installation. The gear interfaces directly with the HOUSING assembly and requires a properly sealed HOUSING cover to maintain lubrication integrity. Always replace the associated O-rings and seals during service to prevent contamination.

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