ZF 4642.108.055 COUNTERSHAFT for WG150 | OEM Genuine Part

Overview

The ZF 4642.108.055 COUNTERSHAFT is a critical internal component within the WG150 series transmission, serving as the primary torque-transfer interface between the input shaft and the main drive gears. This OEM genuine part, identified by SKU 4642.108.055, is precision-machined to maintain exact gear mesh alignment and rotational balance. It sits centrally within the transmission housing, supported by bearings, and directly influences the smooth engagement of all forward and reverse gears. When installed correctly, it ensures minimal power loss and extended service life for the entire driveline assembly.

Symptoms of Failure

When the ZF 4642.108.055 COUNTERSHAFT wears out, operators often notice distinct operational issues. Gear slipping under load is a primary symptom, as worn splines or bearing surfaces cause the countershaft to lose alignment with mating gears. Abnormal whining or grinding noises from the transmission housing indicate bearing surface degradation on the shaft. Metal particles in the transmission fluid are a clear sign of material fatigue, often accompanied by difficulty shifting between ranges due to increased rotational resistance. These failure modes typically progress rapidly once initiated, making early replacement essential.

Technical Specifications

Compatibility

This countershaft is specifically engineered for the ZF WG150 series transmissions, which include models such as the WG150, WG151, and WG152. It is also compatible with the WG180 and WG200 series when used in conjunction with the correct 4642101109: TRANSMISSION HOUSING or 4642301205: TRANSMISSION HOUSING. For proper identification, always verify the 0730365125: TYPE PLATE on your unit. The shaft is secured using the 0631311009: GROOVED STUD to prevent axial movement during high-torque operations.

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