Overview
The ZF 4651.130.016 ENGINE CONNECTION is a critical OEM genuine interface component designed specifically for the WG 100 Series transmission family. This precision-engineered part serves as the mechanical link between the engine flywheel housing and the transmission bell housing, ensuring correct axial alignment and torque transfer during operation. As a factory-specification component, SKU 4651.130.016 guarantees dimensional accuracy and material integrity to prevent vibration-induced wear. When installed alongside the 4651101009: TRANSMISSION HOUSING and the 4651301025: HOUSING, this connection piece forms the structural backbone of the driveline assembly.
Symptoms of Failure
- Oil seepage at the engine-transmission interface: A worn ENGINE CONNECTION often allows transmission fluid to migrate past the mating surface, leaving visible drips or wet patches under the vehicle.
- Abnormal driveline vibration during acceleration: Degraded bolt hole alignment or material fatigue in the connection plate causes harmonic imbalance, felt as a low-frequency shudder between 1200-1800 RPM.
- Difficulty engaging or disengaging gears: Misalignment from a failing connection piece places lateral stress on the input shaft, leading to hard shifting or gear clash in WG100 units.
- Metallic debris in transmission oil pan: Fretting corrosion at the connection surface generates fine steel particles, detectable during routine oil analysis.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4651.130.016 |
| Material | High-tensile cast iron (GGG-40) |
| Overall Diameter | 310 mm (12.2 in) |
| Bolt Hole Circle | 280 mm (11.0 in) |
| Thickness | 18 mm (0.71 in) |
| Weight | 4.2 kg (9.3 lbs) |
| Surface Finish | Zinc-plated with black passivation |
| OEM Reference | ZF 4651.130.016 |
Compatibility
This ENGINE CONNECTION is engineered for the ZF WG 100 Series, but its mounting pattern also fits select models in the WG180 and WG200 families when used with the appropriate 0634303928: O-RING seal kit. It is directly compatible with WG100, WG101, and WG102 transmissions. For WG180 and WG200 applications, verify that the 4651301031: HOUSING is also replaced to maintain proper stack-up tolerances. This part is not backward-compatible with pre-1990 ZF 4HP series units.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101009 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4651301025 | HOUSING | Intermediate adapter housing |
| 0634303928 | O-RING | Sealing element for connection joint |
| 4651301031 | HOUSING | Rear housing cover assembly |
| 4651203002 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4651303005 | SCREEN SHEET | Secondary oil strainer element |
| 0636101032 | CAP SCREW | M10x30 mounting fastener |
| 0630361028 | SEALING CAP | Protective cover for unused ports |
| 4475280060 | SCREW PLUG | Threaded plug for drain/fill holes |
| 0634303312 | O-RING | Seal for screw plug interface |
