ZF 4646.151.080 COUPLING 鈥?WG 250/WG 260/WG 310 Series | OEM Sub-Assembly

Overview

The ZF 4646.151.080 COUPLING is a precision-engineered OEM sub-assembly designed to transmit rotational torque between the engine flywheel and the transmission input shaft in ZF WG 250, WG 260, and WG 310 series gearboxes. This critical driveline component absorbs torsional vibrations and compensates for minor misalignment, ensuring smooth power transfer under heavy loads. As a direct OEM replacement, the SKU 4646.151.080 integrates seamlessly with the TRANSMISSION HOUSING and the COVER assembly, forming the core of the clutch-to-transmission interface. Without this coupling, the transmission cannot engage properly, making it essential for any rebuild or overhaul of WG-series units.

Symptoms of Failure

• Transmission slipping under load: When the coupling wears, it loses its ability to lock the input shaft, causing intermittent power loss during acceleration or hill climbing.
• Abnormal vibration or shuddering: A worn 4646.151.080 coupling allows excessive axial play, transmitting engine vibrations into the cab at specific RPM ranges.
• Oil leaks near the bell housing: Degraded seals within the coupling assembly allow transmission fluid to escape, often mistaken for a main seal failure.
• Clunking noise during gear engagement: Backlash from a fatigued coupling produces a distinct metallic clunk when shifting from Park to Drive or Reverse.

Technical Specifications

Compatibility

This coupling is specifically engineered for ZF WG-series transmissions, including the WG 180, WG 200, WG 250, WG 260, and WG 310 models. It also fits the WG 311 series as a direct sub-assembly replacement. The part is commonly used in municipal buses, fire trucks, and heavy-duty construction vehicles equipped with ZF Ecolife or Ecomat drivetrains. Always verify your transmission serial number before ordering, as minor variations exist between early and late production units.

Related Components

{
“@context”: “https://schema.org”,
“@type”: “FAQPage”,
“mainEntity”: [
{
“@type”: “Question”,
“name”: “What is the ZF 4646.151.080 coupling used for?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “It connects the engine flywheel to the transmission input shaft in ZF WG 250, WG 260, and WG 310 series transmissions, absorbing vibration and ensuring smooth torque transfer.”
}
},
{
“@type”: “Question”,
“name”: “How do I know if my 4646.151.080 coupling is failing?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “Common signs include transmission slipping under load, shuddering during acceleration, oil leaks near the bell housing, and clunking noises when shifting gears.”
}
},
{
“@type”: “Question”,
“name”: “Is the 4646.151.080 compatible with ZF WG 180 or WG 200 transmissions?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “Yes, this coupling is designed for the entire WG series, including WG 180, WG 200, WG 250, WG 260, WG 310, and WG 311 models.”
}
}
]
}

Authorized ZF Distributor

We are a certified supplier of genuine ZF components.