Overview
The ZF 4657.183.363 LOOSE PARTS set is a critical OEM genuine service kit designed specifically for the WG 230 series transmission. This assembly contains the essential loose components required to secure and align internal housing sections during rebuild or repair. Positioned at the interface between the HOUS.FRONT SECT and the HOUSING REAR PART, this kit ensures proper clamping force and structural integrity of the main casing. The SKU 4657.183.363 is factory-matched to the WG230 gearbox, guaranteeing correct fitment without modification. Without these loose parts, the transmission housing cannot maintain oil pressure or bearing alignment, leading to premature wear of internal components.
Symptoms of Failure
- Oil seepage at the housing joint: When the 4657.183.363 loose parts degrade, the seal between the TRANSMISSION HOUSING and the rear section fails, causing visible fluid leaks around the bell housing.
- Intermittent gear slippage under load: Worn fasteners or locating pins in this kit allow the HOUSING REAR SECTION to shift slightly, misaligning the clutch packs and causing erratic engagement.
- Abnormal vibration during shifting: Loose housing sections create micro-movement that transmits through the driveline, producing a distinct shudder between 2nd and 3rd gear.
- Increased operating noise: A rattling sound from the transmission center section indicates that the loose parts have lost their clamping tension, allowing internal components to resonate.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4657.183.363 |
| OEM Reference | ZF 4657.183.363 |
| Material | Hardened steel (fasteners) / Nitrile rubber (seals) |
| Weight | 0.85 kg (1.87 lbs) |
| Dimensions (Kit) | 180 mm x 120 mm x 40 mm |
| Thread Pitch | M10 x 1.5 (primary bolts) |
| Torque Specification | 45 Nm ± 5 Nm |
| Operating Temperature | -40°C to +120°C |
Compatibility
This OEM genuine part is engineered for the ZF WG 230 series transmissions. Based on the housing geometry and fastener pattern, the 4657.183.363 LOOSE PARTS kit is also compatible with the following ZF models: WG180, WG200, WG210, and WG250. It directly interfaces with the TRANSMISSION HOUSING and the HOUSING REAR SECTION. For mixed-model rebuilds, verify that the HOUS.FRONT SECT and HOUSING REAR PART are from the same series to ensure bolt-hole alignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201166 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4657201170 | HOUSING REAR PART | Rear casing section for output bearing |
| 4657298102 | HOUSING REAR SECTION | Complete rear housing assembly |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0636100801 | CAP SCREW | M10 bolt for housing fastening |
| 4656301148 | FIXING PLATE | Locking plate for bolt retention |
| 4657301032 | SCREEN SHEET | Oil filter mesh for sump |
| 4657301033 | SCREEN SHEET | Secondary oil filter screen |
| 0636100803 | CAP SCREW | M12 bolt for rear housing |
