Overview
The ZF 4657.183.190 LOOSE PARTS kit is a critical service component engineered specifically for the WG 210 Series transmission. This genuine OEM assembly includes all necessary fasteners, seals, and positioning elements required to secure internal sub-assemblies within the main gear case. The SKU 4657.183.190 is typically deployed during a full rebuild or when replacing major structural components such as the TRANSMISSION HOUSING. Without this loose parts set, the clutch packs and planetary gear sets cannot be properly retained, leading to axial play and eventual mechanical failure.
Symptoms of Failure
- Intermittent gear slippage under load — When the loose parts in the 4657.183.190 kit fatigue, the retaining hardware can loosen, allowing clutch packs to shift out of alignment. This creates a “soft” engagement that worsens as torque increases.
- Metallic rattling from the bell housing — Worn positioning pins or loose cap screws cause internal components to vibrate against the HOUS.FRONT SECT, producing a distinct rattle at idle that disappears under throttle.
- Chronic oil seepage at housing joints — If the loose parts set includes sealing elements, degradation leads to fluid migration between the HOUSING REAR PART and the main case, visible as wet spots on the transmission exterior.
- Hard shifting or delayed engagement — Misalignment caused by failed locating hardware prevents the valve body from delivering consistent hydraulic pressure to the clutches.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.183.190 |
| OEM Reference | ZF 4657.183.190 |
| Material Composition | Steel (fasteners), Nitrile (seals), Zinc-plated hardware |
| Total Weight (kit) | 0.85 kg (1.87 lbs) |
| Kit Contents | Cap screws, cylindrical pins, fixing plates, screen sheets |
| Torque Specification | Per ZF service manual: 45–55 Nm (M8 fasteners) |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This loose parts kit is designed for the ZF WG 210 Series transmission family. It is also compatible with the WG 180, WG 200, and WG 220 models that share the same rear housing architecture. The kit interfaces directly with the HOUSING REAR SECTION and the main case. Always verify your transmission serial number against the ZF parts catalog before ordering, as minor revisions exist between early and late production units.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101080 | TRANSMISSION HOUSING | Main structural case for gear train |
| 4657201167 | HOUS.FRONT SECT | Front section of the transmission housing |
| 4657201171 | HOUSING REAR PART | Rear housing component for output shaft |
| 4657298103 | HOUSING REAR SECTION | Complete rear housing assembly |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing mating surfaces |
| 0636100801 | CAP SCREW | M8 bolt for securing housing sections |
| 4656301148 | FIXING PLATE | Retains bearing preload in the housing |
| 4657301034 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4657301035 | SCREEN SHEET | Coarse mesh filter for sump return |
| 0636100803 | CAP SCREW | M10 bolt for high-torque housing joints |
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