ZF 4616.107.015 SPEEDOMETER for WG65 | OEM Genuine Part

Overview

The ZF 4616.107.015 SPEEDOMETER is a critical electronic sensor designed specifically for the WG 65 Series transmission family. This OEM genuine part monitors output shaft rotational speed and relays precise data to the vehicle’s ECU and dashboard instrumentation. Positioned within the transmission housing’s rear cover, it converts mechanical rotation into electrical pulses essential for accurate speed indication and shift timing. The SKU 4616.107.015 is manufactured to ZF’s exacting tolerances, ensuring seamless integration with the transmission’s hydraulic control system. When functioning correctly, this speedometer enables smooth gear transitions and prevents driveline stress by providing real-time velocity feedback to the transmission control module.

Symptoms of Failure

• Erratic or fluctuating speedometer readings — The most common indicator of a failing 4616.107.015 is a needle that jumps unpredictably or displays zero speed while the vehicle is moving. This often occurs due to internal magnet degradation or cracked sensor windings.
• Harsh or delayed gear shifts — A worn speedometer sends inconsistent signals to the transmission controller, causing the WG65 to shift at incorrect RPM thresholds. Operators may notice abrupt engagement or prolonged hesitation between gears.
• Transmission warning light activation — Modern ZF systems detect missing or implausible speed signals and trigger dashboard alerts. This symptom frequently accompanies stored diagnostic trouble codes related to output speed sensor circuits.
• Intermittent cruise control disengagement — Since cruise control relies on accurate vehicle speed data, a defective 4616.107.015 can cause the system to drop out unexpectedly, particularly under load or during deceleration.

Technical Specifications

Compatibility

This speedometer is engineered for the ZF WG 65 Series, but its mounting pattern and signal characteristics also suit several other ZF off-highway transmissions. Compatible models include the WG65, WG80, WG100, WG120, WG150, WG180, and WG200 series. It is also commonly used in ZF’s Ecomat and Ecolife coach transmissions where output speed sensing is required. Always verify the tone wheel tooth count (typically 16 or 32 teeth) matches your application before installation.

During replacement, technicians often inspect adjacent components that share the same hydraulic circuit. The 4616105418 VALVE controls clutch pressure modulation and should be checked for debris when the speedometer is removed. The 0501319251 SOLENOID VALVE governs shift timing and may require recalibration after sensor replacement. Additionally, the 0636302013 SCREW PLUG and 0634801038 SEALING RING are frequently replaced together to prevent oil seepage at the sensor mounting bore.

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