ZF 4616.307.008 SPEEDOMETER WORM for WG65 | OEM Genuine Part

Overview

The ZF 4616.307.008 SPEEDOMETER WORM is a precision-machined gear component engineered specifically for the ZF WG65 series transmission. This OEM genuine part, identified by SKU 4616.307.008, interfaces directly with the output shaft to drive the vehicle’s speedometer system by translating rotational speed into a mechanical signal. Situated within the rear section of the transmission housing, this worm gear ensures accurate speed data is relayed to the dashboard. For complete assembly integrity, it is often installed alongside the 4616105402: OUTPUT and the 4005303005: OUTPUT FLANGE, which together secure the driveline connection.

Symptoms of Failure

• Intermittent or total speedometer failure: A worn worm gear causes erratic needle movement or a complete loss of speed readout, a common long-tail search query for “ZF transmission speed sensor gear failure.”
• Oil seepage around the speedometer drive housing: Deterioration of the gear’s seal surface leads to transmission fluid leaks, often searched as “WG65 speedometer worm oil leak.”
• Grinding or whining noise from the transmission tail section: Worn teeth on the 4616.307.008 produce audible metal-on-metal sounds during operation, matching queries like “ZF transmission whining noise when driving.”
• Inaccurate odometer readings: Slippage between the worm and driven gear results in mileage discrepancies, a symptom frequently reported in “ZF speedometer worm gear slipping” searches.

Technical Specifications

Compatibility

This speedometer worm is primarily designed for the ZF WG65 series transmission. Based on its mechanical interface and gear ratio, it is also compatible with the ZF WG180, WG200, and WG250 models that utilize a similar output shaft configuration. The part integrates directly with the 4616101119: TRANSMISSION HOUSING and is secured using a 0636011038: HEXAGON SCREW. Always verify your transmission serial number before ordering to ensure proper fitment.

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