ZF 4646.153.412 COUPLING for WG 250/WG 260/WG 310 | OEM Genuine Part

Overview

The ZF 4646.153.412 COUPLING is a critical torque-transfer component engineered for the WG 251 Series and compatible WG 250, WG 260, and WG 310 transmission families. This OEM genuine part sits directly between the transmission output shaft and the driveline flange, ensuring smooth rotational engagement and dampening torsional vibrations. The SKU 4646.153.412 is precision-machined to ZF’s exacting tolerances, making it a direct replacement for worn or damaged couplings in heavy-duty industrial and marine applications. When installed alongside the TRANSMISSION HOUSING (4646101072), it maintains proper alignment and load distribution within the gear train.

Symptoms of Failure

• Driveline shudder or vibration during acceleration: A worn 4646.153.412 coupling loses its dampening capacity, causing noticeable shuddering in the WG 250 or WG 260 transmission under load.
• Metallic clicking or clunking from the bell housing: Excessive play in the coupling produces audible noise, especially when shifting between forward and reverse gears.
• Oil seepage around the output flange area: Degraded coupling seals allow transmission fluid to escape, often mistaken for a failing HOUSING (4646301201) gasket.
• Intermittent gear slipping under heavy torque: As the coupling splines wear, torque transmission becomes inconsistent, mimicking clutch or valve body issues.

Technical Specifications

Compatibility

This coupling is designed for ZF’s WG series powershift transmissions, specifically the WG 251 Series. It is also a direct fit for the WG 180, WG 200, WG 250, WG 260, and WG 310 models used in construction, agricultural, and material handling equipment. Always verify that the mating COVER (4646301166) and CAP SCREW (0636101051) are in good condition during installation to prevent premature wear.

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