ZF 4699.302.180 DRIVE PINION for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 4699.302.180 DRIVE PINION is a critical gear component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part transfers rotational force from the input shaft to the differential assembly, directly influencing torque delivery and driveline efficiency. The SKU 4699.302.180 is precision-machined to maintain exact tooth engagement within the planetary gear set, ensuring smooth power flow under heavy loads. When installed alongside the 4699101046 HOUSING and 4699301109 HOUSING, this pinion forms the core of the final drive unit, converting high-speed input into usable wheel torque for industrial vehicles.

Symptoms of Failure

• Whining or grinding noise during acceleration: Worn pinion teeth produce a distinct metallic whine that intensifies under load, often misdiagnosed as wheel bearing failure.
• Vibration in the driveline at highway speeds: Uneven tooth wear creates harmonic vibrations felt through the chassis, particularly in WG130-equipped trucks.
• Oil leaks near the pinion seal area: A failing pinion can damage the adjacent shaft seal, causing transmission fluid to weep from the 4699301017 BEARING COVER interface.
• Delayed engagement or gear slippage: Excessive backlash from a worn pinion prevents proper torque transfer, leading to hesitation when shifting between forward and reverse.

Technical Specifications

Compatibility

This drive pinion is specifically designed for ZF WG100, WG130, and WG131 transmissions found in medium-duty trucks, buses, and construction equipment. It is also compatible with the WG180 and WG200 series when used with the correct 4699301085 COVER and bearing preload shims. Always verify the tooth pattern and spline count against your existing pinion before installation, as variations exist between early and late production models.

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