Overview
The ZF 4657.183.439 LOOSE PARTS set is a critical OEM genuine service kit designed specifically for the WG 211 Series transmission. This assembly contains the essential loose hardware and small components required to secure and align internal transmission sections during a rebuild or major repair. Positioned at the interface between the main casing and the front/rear housing sections, this kit ensures proper clamping force and structural integrity. The SKU 4657.183.439 is factory-sealed and contains only genuine ZF components, eliminating the risk of using mismatched or substandard fasteners in high-torque applications.
Symptoms of Failure
When the components within the 4657.183.439 LOOSE PARTS kit wear out or are improperly installed, operators will notice distinct performance issues. Transmission oil seepage at the housing joint is the most common symptom, often appearing as a thin film of fluid around the bell housing or mid-case seam. Intermittent gear slippage under load occurs when the fasteners lose their torque retention, allowing the housing sections to shift slightly. A persistent metallic rattling from the transmission tunnel indicates that the cylindrical pins or fixing plates have loosened, causing internal components to vibrate against the casing. Finally, difficulty engaging forward or reverse gears can result from misalignment of the front section relative to the main housing.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4657.183.439 |
| Kit Contents | Bolts, pins, washers, sealing elements |
| Material Composition | Steel (fasteners), Nitrile (seals) |
| Weight (approx.) | 0.85 kg (1.87 lbs) |
| Thread Pitch (primary bolts) | M10 x 1.5 |
| Torque Specification | 45 Nm + 90° (angle tighten) |
| Operating Temperature Range | -40°C to +120°C |
| OEM Reference | ZF 4657.183.439 |
Compatibility
This LOOSE PARTS kit is engineered for the ZF WG 211 Series transmission family. It is also compatible with the WG180 and WG200 models when used with the appropriate TRANSMISSION HOUSING. The kit interfaces directly with the HOUS.FRONT SECT and the HOUSING REAR PART to secure the entire driveline assembly. For precise alignment, the kit includes a CYLINDRICAL PIN that indexes the housing sections. Applications include municipal buses, heavy-duty trucks, and off-highway equipment using ZF’s modular transmission architecture.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101087 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4657301172 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4657301173 | HOUSING REAR PART | Rear section housing for output flange |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0636102489 | CAP SCREW | M10 fastener for housing joints |
| 4656301148 | FIXING PLATE | Locking plate for bolt retention |
| 0636102463 | CAP SCREW | M8 fastener for accessory mounts |
| 4657201133 | SCREEN SHEET | Magnetic debris screen for oil pan |
| 0636115287 | CAP SCREW | M12 fastener for heavy-duty joints |
| 4657301065 | PLATE | Spacer plate for valve body clearance |
