ZF 4644.304.008 OUTPUT GEAR for WG180 | OEM Genuine Part

Overview

The ZF 4644.304.008 OUTPUT GEAR is a critical component within the WG180 series transmission, responsible for transferring rotational force from the planetary gear set to the driveshaft. This OEM genuine part, identified by SKU 4644.304.008, is precision-machined to maintain exacting tolerances for smooth power delivery and long service life. It sits at the rear of the transmission housing, directly interfacing with the output shaft and bearing assembly. When paired with a robust TRANSMISSION HOUSING, this gear ensures minimal backlash and optimal torque transmission under heavy loads.

Symptoms of Failure

• Whining or grinding noise during acceleration: Worn gear teeth produce a distinct high-pitched whine that intensifies under load, often mistaken for bearing failure.
• Vibration in the driveline at highway speeds: Uneven tooth wear causes harmonic vibrations that can be felt through the chassis, particularly in the 40-60 mph range.
• Metallic debris in transmission fluid: Flakes or particles found during oil changes indicate advanced gear degradation, often accompanied by a burnt smell.
• Intermittent gear slipping under heavy torque: Damaged output gear teeth fail to engage properly, causing momentary loss of power during uphill climbs or towing.

Technical Specifications

Compatibility

This output gear is specifically engineered for the ZF WG180 series, but it also fits select variants of the WG200 and WG150 transmissions due to shared spline dimensions. It is a direct replacement for units manufactured between 1998 and 2015. For proper installation, ensure the TRANSMISSION HOUSING is free of cracks and the TYPE PLATE matches your model. Secure the gear using the correct GROOVED STUD to prevent axial play. Always verify your transmission serial number against the ZF parts catalog before ordering.

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