Overview
The ZF 4644.130.400 ENGINE CONNECTION is a critical OEM genuine interface component designed for the WG 200 Series transmission family. This precision-engineered part serves as the primary mechanical link between the engine flywheel housing and the transmission bell housing, ensuring correct axial alignment and torque transfer during operation. As a genuine ZF part, the SKU 4644.130.400 guarantees exact fitment and material integrity, preventing misalignment that can lead to premature bearing wear or driveline vibration. It is typically installed during transmission assembly or rebuild, working in concert with the TRANSMISSION HOUSING (4644101177) and the TRANSMISSION HOUSING (4644301229) to form the structural backbone of the unit.
Symptoms of Failure
- Transmission-to-engine oil leaks: A worn or cracked ENGINE CONNECTION often allows transmission fluid to seep past the mating surface, visible as drips between the engine and transmission bell housing.
- Persistent gear slipping under load: When this part fatigues, the housing alignment shifts slightly, causing the input shaft to misalign with the torque converter, resulting in intermittent gear engagement loss during acceleration.
- Abnormal driveline vibration: A degraded connection can introduce lateral play, transmitting low-frequency vibrations through the chassis that worsen at specific RPM ranges.
- Difficulty in transmission removal or installation: Warpage or corrosion on the mounting face makes it impossible to achieve proper bolt torque, often requiring replacement before reassembly.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 4644.130.400 |
| Product Name | ENGINE CONNECTION |
| Material | High-grade cast aluminum alloy (GG-25 equivalent) |
| Overall Diameter | 320 mm (approx.) |
| Mounting Bolt Pattern | 8-hole, 12 mm diameter (SAE standard) |
| Weight | 2.8 kg (6.2 lbs) |
| OEM Reference | ZF 4644.130.400 (Genuine) |
| Surface Finish | Machined, anodized corrosion protection |
Compatibility
This ENGINE CONNECTION is primarily designed for the ZF WG 200 Series transmissions, including the WG200, WG210, and WG220 variants. It is also compatible with select WG180 models that share the same bell housing bolt pattern. Always verify the TYPE PLATE (0730365067) on your transmission to confirm exact model identification before ordering. The part mounts directly to the GROOVED STUD (0631311009) for precise alignment during installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101177 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4644301229 | TRANSMISSION HOUSING | Secondary housing for clutch pack support |
| 0730365067 | TYPE PLATE | Identification tag for transmission model |
| 0631311009 | GROOVED STUD | Alignment dowel for engine connection |
| 4644303060 | COVER PLATE | Seals access opening on housing |
| 4644303061 | COVER PLATE | Alternate cover plate variant |
| 0634306525 | O-RING | Fluid seal between connection and housing |
| 0636305026 | SCREW PLUG | Drain/fill port closure |
| 0501316470 | BREATHER | Pressure equalization vent |
| 4644301279 | SCREEN SHEET | Filter mesh for oil intake |
