Overview
The ZF 4644.130.011 ENGINE CONNECTION is a critical interface component designed for the WG 201 Series transmission family. This OEM genuine part serves as the primary mechanical link between the engine flywheel housing and the transmission bell housing, ensuring precise alignment and torque transfer during operation. As a structural adapter, it absorbs vibrational loads and maintains concentricity between the power source and the gearbox. The SKU 4644.130.011 is manufactured to ZF’s original specifications, guaranteeing a direct fit and long service life in heavy-duty industrial applications. Without this connection, the transmission cannot be securely mounted to the engine, making it essential for any rebuild or replacement project.
Symptoms of Failure
When the ZF 4644.130.011 ENGINE CONNECTION begins to wear, operators may notice several distinct failure indicators. Oil leaks at the engine-transmission mating surface are a common early sign, often caused by gasket degradation or housing distortion. Gear slipping under load can occur if the connection loses its precise alignment, leading to improper clutch engagement. Unusual vibration or knocking noises during acceleration typically indicate that the mounting bolts have loosened or the part has developed cracks. Finally, difficulty shifting between forward and reverse gears may point to a compromised connection that affects the transmission’s input shaft positioning.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4644.130.011 |
| OEM Reference | ZF 4644.130.011 |
| Material | High-strength cast iron (GGG-40) |
| Weight | 2.85 kg (6.28 lbs) |
| Outer Diameter | 210 mm |
| Bolt Hole Pattern | 8 x M12 on 180 mm PCD |
| Surface Treatment | Phosphate coated for corrosion resistance |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This ENGINE CONNECTION is specifically engineered for the ZF WG 201 Series, but it also fits select models in the WG180, WG200, and WG210 families where the bell housing interface matches. It is commonly used in off-highway vehicles, construction equipment, and marine propulsion systems that utilize ZF’s modular transmission architecture. Always verify the bolt pattern and pilot bore diameter against your existing part before installation. For complete assembly, this part integrates with the 4644101160 TRANSMISSION HOUSING and the 4644301323 TRANSMISSION HOUSING, which provide the main structural enclosure. The connection also requires the 4644301189 THREADED BUSH for secure bolt engagement and the 4475280043 SCREW PLUG to seal hydraulic passages.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101160 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4644301323 | TRANSMISSION HOUSING | Alternate housing variant for WG series |
| 4644301189 | THREADED BUSH | Provides wear-resistant bolt threads |
| 4475280043 | SCREW PLUG | Seals oil galleries and ports |
| 0634306198 | O-RING | Creates leak-proof joint between components |
| 0730365067 | TYPE PLATE | Identification label with serial number |
| 4644301161 | COVER PLATE | Protects internal components from debris |
| 0636100621 | HEXAGON SCREW | Fastens housing to connection plate |
| 0631610020 | SET SCREW | Locks adjustment positions |
| 0501218540 | BREATHER | Equalizes internal pressure |
