ZF 4616.123.044 PLANETARY DRIVE for WG65 | OEM Genuine Part

Overview

The ZF 4616.123.044 PLANETARY DRIVE is a critical torque-multiplying assembly within the WG 65 Series transmission. This OEM genuine part transfers rotational force from the turbine shaft to the output section, enabling smooth gear ratio changes under heavy load. The SKU 4616.123.044 sits directly between the 4616105413: OUTPUT and the main 4616101127: TRANSMISSION HOUSING, forming the core of the planetary gearset. Precision-ground gears and hardened steel carriers ensure reliable power distribution in construction and material handling equipment.

Symptoms of Failure

• Intermittent gear slipping under load: Worn planetary gears cause the transmission to momentarily lose torque when climbing grades or hauling heavy payloads.
• Metallic grinding noise from the bell housing: Damaged roller bearings or sun gear teeth produce a distinct whining or grinding sound during acceleration or deceleration.
• Contaminated transmission fluid with metallic particles: Flaking from the planetary carrier or thrust washers introduces bronze or steel debris into the oil, often visible during filter changes.
• Delayed engagement or harsh shifting: A failing planetary drive disrupts hydraulic pressure modulation, leading to jerky gear changes or a noticeable lag when shifting from neutral to drive.

Technical Specifications

Compatibility

This planetary drive is engineered for the ZF WG 65 Series, but it also fits select models in the WG180 and WG200 families when used with the correct 4616203017: OUTPUT FLANGE. Compatible transmission models include WG65, WG65/II, WG180/II, and WG200/II. Always verify the spline count and housing bore diameter against your existing unit. The planetary drive is secured using 0636011038: HEXAGON SCREW fasteners, which must be torqued to factory specifications during installation.

Related Components