ZF 4642.151.488 COUPLING for WG 150 | OEM Genuine Part

Overview

The ZF 4642.151.488 COUPLING for WG 150 is a precision-engineered OEM genuine part designed to transfer rotational torque between the engine output and the transmission input shaft within the ZF WG 150 series. This coupling absorbs torsional vibrations and compensates for minor misalignment, ensuring smooth power delivery and protecting downstream components from shock loads. The SKU 4642.151.488 sits directly between the flywheel housing and the transmission housing, acting as a critical interface in the drivetrain assembly. When paired with a robust TRANSMISSION HOUSING, this coupling maintains structural integrity under high-torque conditions, reducing wear on adjacent gears and bearings.

Symptoms of Failure

• Torque fluctuation under load: Worn coupling teeth or elastomeric elements cause irregular power transfer, leading to surging or hesitation during acceleration.
• Metallic rattling at idle: Excessive clearance in the coupling produces a distinct clattering noise, especially when the transmission is in neutral.
• Oil seepage near the bell housing: Degraded seals within the coupling assembly allow transmission fluid to escape, often visible as wet spots on the TRANSMISSION HOUSING.
• Vibration during gear engagement: A failing coupling fails to dampen driveline oscillations, causing noticeable shudder when shifting from park to drive or reverse.

Technical Specifications

Compatibility

This coupling is primarily designed for the ZF WG 150 series, but it also fits select models in the WG 180 and WG 200 families due to shared bell housing patterns. It is commonly used in ZF 6WG150, 6WG180, and 6WG200 transmissions found in municipal buses, fire trucks, and heavy-duty construction vehicles. For proper installation, ensure the mating TYPE PLATE matches your transmission model, and secure the assembly with a GROOVED STUD to prevent loosening under vibration.

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