ZF 4644.303.215 SPEEDOMETER PINION for WG180/WG200 | OEM Genuine Part

Overview

The ZF 4644.303.215 SPEEDOMETER PINION is a precision-machined component responsible for driving the vehicle’s speedometer by engaging directly with the output shaft gear within the transmission housing. Located in the rear section of the gearbox, this OEM genuine part ensures accurate vehicle speed readings for ZF WG180 and WG200 series transmissions. The SKU 4644.303.215 is manufactured to strict ZF tolerances, providing a direct replacement that maintains factory calibration. When installed alongside the TRANSMISSION HOUSING, this pinion interfaces seamlessly with the HOUSING assembly to prevent signal drift and mechanical wear.

Symptoms of Failure

• Erratic or fluctuating speedometer needle: A worn 4644.303.215 pinion gear causes inconsistent engagement with the output shaft, leading to jumping or bouncing speed readings during steady cruising.
• Complete loss of speedometer function: When the plastic or metal teeth shear off, the speedometer stops working entirely, often accompanied by a check engine light for vehicle speed sensor faults.
• Transmission oil seepage around the speedometer drive port: A cracked or degraded pinion housing seal allows ATF fluid to leak past the O-RING, leaving puddles under the transmission bell housing.
• Audible whining or grinding noise from the transmission tail housing: Worn bearing surfaces on the pinion shaft create a high-pitched noise that increases with vehicle speed, indicating imminent failure.

Technical Specifications

Compatibility

This speedometer pinion is engineered exclusively for ZF WG180 and WG200 series transmissions. It directly replaces the original equipment part in models such as the WG180, WG200, and their derivative variants used in medium-duty trucks, buses, and off-highway vehicles. The 4644.303.215 fits the output speed sensor port and requires the GROOVED STUD for secure mounting. For complete assembly, verify that the TYPE PLATE on your transmission matches the WG180/WG200 designation. This part is not compatible with ZF 4HP or 5HP series automatic transmissions.

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