ZF 2099.310.198 IMPULSE GEAR for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 2099.310.198 IMPULSE GEAR is a precision-machined component engineered for the internal power transfer assembly within ZF WG100, WG130, and WG131 transmissions. This OEM genuine part, identified by SKU 2099.310.198, functions as a critical torque-sensing element that modulates hydraulic pressure in response to engine speed. It sits directly on the input shaft cluster, interfacing with the 2098309011: CROWN WHEEL to synchronize gear engagement under load. Without this impulse gear, the transmission cannot correctly regulate shift timing, leading to erratic performance.

Symptoms of Failure

• Erratic or delayed shifting under load: A worn impulse gear fails to send accurate speed signals, causing the transmission to hesitate or slam into gears during acceleration.
• Whining or grinding noise from the gear train: As the teeth wear unevenly, audible metal-on-metal contact occurs, especially when the 2098109042: DIFFERENTIAL is under torque.
• Intermittent loss of drive in forward gears: The impulse gear’s inability to maintain hydraulic pressure results in temporary power loss, often misdiagnosed as a solenoid failure.
• Contaminated transmission fluid with metallic debris: Flaking material from the impulse gear circulates through the system, accelerating wear on the 2099209001: DIFFERENTIAL and adjacent bearings.

Technical Specifications

Compatibility

This impulse gear is specifically designed for ZF WG-series transmissions. Verified direct-fit applications include:

• ZF WG100 (all variants)
• ZF WG130 (including WG131)
• ZF WG180 (with 2098309010: DIFFERENTIAL HOUSING adapter)
• ZF WG200 (post-2005 production)

It is not compatible with ZF Ecolife or AS Tronic series. Always confirm spline count and bore diameter against your existing part before installation.

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