ZF 4616.108.401 COUNTERSHAFT for WG65 | OEM Genuine Part

Overview

The ZF 4616.108.401 COUNTERSHAFT is a critical rotating component engineered specifically for the WG 65 Series transmission. It serves as the primary torque-transfer interface between gear clusters, ensuring synchronized power distribution across the drivetrain. As an OEM genuine part, the SKU 4616.108.401 is precision-machined to maintain exact gear mesh alignment, reducing vibration and heat buildup. This countershaft sits within the lower gear train assembly, directly interacting with the 4616101059: TRANSMISSION HOUSING to provide structural rigidity. When installed with the correct 0636011038: HEXAGON SCREW fasteners, it delivers reliable performance under high-torque industrial loads.

Symptoms of Failure

• Gear grinding or whining noise during acceleration – Worn countershaft splines cause irregular gear engagement, producing audible metallic sounds that worsen under load.
• Intermittent gear slipping in higher ranges – A fatigued countershaft allows gear clusters to shift out of alignment, leading to sudden power loss or delayed engagement.
• Metal debris in transmission oil filter – Flaking from a damaged countershaft surface contaminates the lubricant, often detected during routine filter inspection.
• Vibration through the shift lever or chassis – Unbalanced rotation from a bent countershaft transmits harmonic oscillations throughout the transmission housing.

Technical Specifications

Compatibility

This countershaft is designed for the WG 65 Series transmission family. Based on its spline configuration and bearing spacing, it is also compatible with the following ZF models: WG180, WG200, and WG250 (when used with the appropriate 0636011118: HEXAGON SCREW and 0636016015: HEXAGON SCREW kits). Always verify shaft length against your transmission serial number before installation.

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