ZF 4616.168.408 SPLITTER BOX for WG65 | OEM Genuine Part

Overview

The ZF 4616.168.408 SPLITTER BOX is a precision-engineered sub-assembly designed exclusively for the WG 65 series of heavy-duty transmissions. This OEM genuine part functions as the primary gear-range multiplier, allowing the operator to split each main gear ratio for finer torque control and smoother shifting under load. Located between the main transmission housing and the output section, the splitter box integrates directly with the 4616105413: OUTPUT assembly to manage power distribution. The SKU 4616.168.408 is manufactured to ZF’s original tolerances, ensuring a direct bolt-on replacement without modification.

Symptoms of Failure

• Delayed or harsh range shifts – When the splitter box internal synchronizers wear, you may experience a noticeable lag or clunk when moving between high and low split ranges.
• Oil seepage at the splitter housing seam – A failing gasket or cracked housing can cause ATF fluid to weep from the joint between the splitter box and the 4616101117: TRANSMISSION HOUSING, leaving visible drips on the bell housing.
• Intermittent gear disengagement under load – Worn shift forks or damaged detent springs inside the 4616.168.408 can cause the splitter to pop out of gear during uphill pulls or heavy hauling.
• Unusual whining or grinding noise in neutral – Bearing degradation within the splitter box produces a metallic whine that increases with engine RPM, even when the transmission is in neutral.

Technical Specifications

Compatibility

This splitter box is engineered for the ZF WG 65 transmission family, which includes the WG65, WG80, WG120, WG150, WG180, and WG200 models. It is a direct replacement for earlier splitter assemblies used in WG 65 series units produced after 2005. The 4616.168.408 interfaces with the 4616203017: OUTPUT FLANGE via a splined connection and is secured to the main case using 0636011038: HEXAGON SCREW fasteners. Always verify your transmission serial number before ordering.

Related Components

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