ZF 2099.364.008 SPUR GEAR for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 2099.364.008 SPUR GEAR is a precision-machined OEM genuine component engineered for the power transfer assembly within ZF WG100, WG130, and WG131 transmissions. This spur gear sits directly on the countershaft, meshing with the input shaft to modulate torque distribution before it reaches the differential unit. As a critical element in the gear train, the SKU 2099.364.008 ensures smooth rotational energy flow, reducing backlash and vibration under heavy loads. When paired with a compatible 2099109002 DIFFERENTIAL, this gear maintains consistent drive force across the axle assembly.

Symptoms of Failure

• Whining or howling noise during acceleration — Worn teeth on the 2099.364.008 create irregular contact patterns, producing a high-pitched metallic sound that intensifies under load.
• Intermittent gear slipping under torque — Excessive tooth wear reduces engagement depth, causing the spur gear to skip or lose traction when climbing grades or hauling heavy payloads.
• Metallic debris in transmission fluid — Flaking or pitting on the gear surface sheds fine steel particles into the oil, often visible during drain intervals or on the magnetic drain plug.
• Vibration through the driveline at cruising speeds — Imbalanced or chipped gear teeth transmit oscillation to the 2099209001 DIFFERENTIAL, causing noticeable shudder in the chassis.

Technical Specifications

Compatibility

This spur gear is specifically designed for the ZF WG100, WG130, and WG131 transmission series. It also fits select variants of the WG180 and WG200 models when used in conjunction with the correct 2098309010 DIFFERENTIAL HOUSING. For WG200 applications, verify the tooth count matches the mating 2099364014 CROWN WHEEL to ensure proper backlash clearance. The 2099.364.008 is not backward-compatible with older WG80 or WG90 series without shaft modification.

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