ZF 4108.302.158 BEVEL PINION for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 4108.302.158 BEVEL PINION is a critical gear component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part transfers rotational power from the input shaft to the differential ring gear, enabling smooth torque distribution within the final drive assembly. The SKU 4108.302.158 is precision-machined to maintain exact gear mesh alignment, directly influencing driveline efficiency and noise reduction. It sits within the transmission housing, working in concert with the 4108101128: TRANSMISSION HOUSING to ensure proper bearing support and oil circulation.

Symptoms of Failure

• Whining or howling noise during acceleration: Worn bevel pinion teeth create irregular contact patterns, producing a distinct high-pitched sound that intensifies under load.
• Vibration in the driveline at highway speeds: Excessive pinion wear leads to rotational imbalance, causing noticeable shuddering through the chassis.
• Oil leaks near the pinion seal area: Degraded pinion bearings or shaft wear can compromise the seal surface, allowing transmission fluid to escape.
• Intermittent gear slipping or harsh engagement: Backlash beyond factory tolerances prevents consistent torque transfer, resulting in delayed or jerky shifts.

Technical Specifications

Compatibility

This bevel pinion is specifically designed for ZF WG100, WG130, and WG131 transmissions. It is also compatible with select WG180 and WG200 variants that share the same final drive architecture. Always verify the housing configuration; the 4108201296: HOUSING and 4475280018: SCREW PLUG are frequently replaced concurrently during pinion overhaul. Use the 0501215601: OIL LEVEL GAGE to confirm proper lubricant fill after installation.

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