ZF 4616.123.009 PLANETARY DRIVE for WG65 | OEM Genuine Part

Overview

The ZF 4616.123.009 PLANETARY DRIVE is a critical torque-multiplying assembly engineered specifically for the WG 65 Series transmission. This OEM genuine part, identified by SKU 4616.123.009, sits within the main gear train and is responsible for distributing rotational force across the planetary gears. It directly interfaces with the TRANSMISSION HOUSING (4616101059) to ensure precise alignment and load distribution. Without this planetary drive, the transmission cannot achieve its rated gear ratios, making it essential for heavy-duty industrial applications where consistent power delivery is non-negotiable.

Symptoms of Failure

When the ZF 4616.123.009 planetary drive begins to degrade, operators typically notice three distinct failure modes. First, intermittent gear slipping under load becomes apparent during uphill climbs or heavy hauling, often accompanied by a grinding noise. Second, metal particles in the transmission fluid indicate internal wear, which can be detected during routine oil sampling. Third, erratic shift timing occurs as the planetary gears lose their precise engagement, causing delayed or harsh gear changes. These symptoms often worsen when the assembly is not properly secured with the correct HEXAGON SCREW (0636011038) and HEXAGON SCREW (0636011118) fasteners.

Technical Specifications

Compatibility

This planetary drive is designed for the ZF WG 65 Series, which includes models such as the WG65, WG80, and WG100 transmissions. It is also compatible with select WG120 and WG150 variants that share the same planetary carrier architecture. The part requires precise alignment with the HEXAGON SCREW (0636016015) for secure mounting to the output shaft. Always verify your transmission model number against the OEM parts catalog before installation.

Related Components

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“text”: “The earliest indicators include a whining noise from the transmission during acceleration, followed by metal shavings in the oil filter. Many operators also report a noticeable vibration at highway speeds before complete failure occurs.”
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“name”: “Can I replace the planetary drive without removing the transmission housing?”,
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“text”: “No. The planetary drive is nested inside the transmission housing (part 4616101059). You must remove the housing and all associated hexagon screws (0636011038, 0636011118, 0636016015) to access the planetary assembly. Attempting to replace it in situ risks damaging the gear teeth.”
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“text”: “This OEM part is designed for ZF-approved mineral oils (e.g., ZF TE-ML 03 or 05). Using non-spec fluids can cause premature wear on the planetary gears and void any warranty claims. Always consult the technical manual for your specific WG65 variant.”
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