ZF 4651.303.008 OUTPUT GEAR for WG100 | OEM Genuine Part

Overview

The ZF 4651.303.008 OUTPUT GEAR is a critical driveline component engineered specifically for the WG 100 series transmission family. This genuine OEM part transfers rotational force from the planetary gear set to the output shaft, ensuring smooth power delivery in heavy-duty industrial applications. Machined from high-strength alloy steel, the 4651.303.008 gear interfaces directly with the TRANSMISSION HOUSING (4651101007) and the HOUSING (4651301029) to maintain precise gear alignment under extreme torque loads. As a genuine ZF part, SKU 4651.303.008 guarantees factory tolerances and metallurgical specifications that aftermarket copies cannot replicate.

Symptoms of Failure

• Audible whining or grinding noise from the transmission output area — Worn gear teeth create irregular contact patterns, producing a distinct metallic sound during acceleration or deceleration.
• Vibration through the driveline at highway speeds — A failing output gear introduces rotational imbalance that resonates through the chassis, often misdiagnosed as a driveshaft issue.
• Oil seepage near the output flange seal — Excessive gear play can distort the sealing surface, allowing transmission fluid to escape past the O-RING (0634303928).
• Intermittent gear slipping under load — Worn splines on the 4651.303.008 gear lose engagement with mating components, causing momentary power loss when climbing grades or hauling heavy loads.

Technical Specifications

Compatibility

This genuine ZF output gear is designed for the WG 100 series transmission platform. Based on its spline configuration and gear geometry, the 4651.303.008 is compatible with the following ZF models: WG100, WG120, WG150, and WG180. It also fits select WG200 variants produced before 2015. Always verify your transmission’s serial number against the HOUSING (4651301024) casting marks to confirm compatibility before installation.

Related Components