Overview
The ZF 4644.130.275 ENGINE CONNECTION is a critical interface component designed for the WG 200 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 while maintaining the concentricity required for optimal driveline performance. The SKU 4644.130.275 is engineered to ZF’s exacting tolerances, making it indispensable for maintaining the integrity of the entire powertrain assembly. When paired with a robust TRANSMISSION HOUSING, this connection point guarantees reliable power delivery under heavy-duty conditions.
Symptoms of Failure
- Transmission oil leaks at the engine-transmission interface: A worn 4644.130.275 ENGINE CONNECTION often causes fluid seepage around the mating surface, leading to gradual oil loss and potential contamination of clutch components.
- Abnormal gear engagement noise during acceleration: When this part degrades, misalignment between the engine and transmission produces a distinct metallic chatter or grinding sound, especially under load.
- Vibration through the chassis at highway speeds: A failing connection point allows excessive driveline oscillation, felt as a persistent shudder that worsens with RPM increases.
- Premature wear of the shift system components: Misalignment stresses the entire assembly, accelerating damage to parts like the SHIFT SYSTEM and requiring earlier replacement intervals.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4644.130.275 |
| Material | High-strength cast aluminum alloy (EN AC-42100) |
| Weight | 2.85 kg (6.28 lbs) |
| Overall Dimensions | 245 mm x 180 mm x 95 mm |
| Bolt Hole Pattern | 6x M12 x 1.5 on 160 mm PCD |
| OEM Reference | ZF 4644.130.275 |
| Operating Temperature Range | -40°C to +120°C |
| Sealing Method | Integrated O-ring groove (compatible with O-RING 0634306198) |
Compatibility
This ENGINE CONNECTION is specifically validated for the ZF WG 200 Series transmissions, including the WG200, WG210, and WG220 variants. It also fits select WG180 models when used with an adapter kit. The part is designed to interface directly with the TRANSMISSION HOUSING and requires a SCREW PLUG for proper fluid sealing. For applications involving the WG200 series, always verify the housing casting number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101232 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4644301282 | TRANSMISSION HOUSING | Alternate housing variant for WG200 |
| 4475280043 | SCREW PLUG | Seals fluid passages in the housing |
| 0634306198 | O-RING | Provides leak-proof seal at connection |
| 0730365067 | TYPE PLATE | Identification label for transmission |
| 4644301298 | COVER PLATE | Protects internal components from debris |
| 4644106300 | SHIFT SYSTEM | Controls gear selection mechanism |
| 4644306500 | COVER PLATE | Secondary access cover for maintenance |
| 4644159300 | SHIFT SYSTEM | Alternate shift assembly variant |
| 4644306560 | VALVE BLOCK | Hydraulic control unit for clutch actuation |
