Overview
The ZF 4644.183.009 LOOSE PARTS for WG200 is a critical internal component set designed for the WG 200 Series transmission. This genuine OEM part serves as a precision-engineered assembly of fasteners, spacers, and retaining elements that secure key internal structures within the gearbox. Positioned within the main housing, the 4644.183.009 ensures that adjacent assemblies—such as the 4644101249: TRANSMISSION HOUSING and the 4644301402: TRANSMISSION HOUSING—remain properly aligned under high torque loads. Without these loose parts, the transmission’s internal geometry would shift, leading to premature wear. The SKU 4644.183.009 is factory-matched to ZF’s exact tolerances, guaranteeing a direct fit without modification.
Symptoms of Failure
- Intermittent gear slipping under load: When the 4644.183.009 loose parts fatigue, the 4644301298: COVER PLATE can shift, causing clutch packs to lose clamping force.
- Oil seepage at housing seams: Worn or missing loose parts allow the 0634306323: O-RING to deform, resulting in slow drips from the bell housing area.
- Abnormal vibration during shifting: Degraded fasteners in the 4644.183.009 set create micro-movement between the transmission housing and valve body, producing a distinct shudder.
- Hard-to-diagnose rattle at idle: Loose retaining elements cause internal components like the screen sheet to resonate, often mistaken for bearing noise.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4644.183.009 |
| Material | Case-hardened steel with zinc-nickel plating |
| Weight | 0.42 kg (0.93 lbs) |
| Dimensions | 120 mm x 80 mm x 25 mm (kit) |
| OEM Reference | ZF 4644.183.009 |
| Thread Pitch | M8 x 1.25 (primary fasteners) |
| Torque Spec | 25 Nm ± 2 Nm (dry) |
Compatibility
This genuine ZF 4644.183.009 loose parts kit is primarily engineered for the WG 200 Series transmissions. Based on its design and fastener geometry, it is also compatible with the WG 180 and WG 210 models that share the same housing architecture. The kit interfaces directly with the 4644101249: TRANSMISSION HOUSING and the 4644301402: TRANSMISSION HOUSING. Always verify your transmission serial number against ZF’s parts catalog before installation. For models with integrated parking brake systems, confirm compatibility with the 4644109044: PARKING BRAKE assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101249 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4644301402 | TRANSMISSION HOUSING | Secondary housing for valve body |
| 4644301298 | COVER PLATE | Seals the clutch access port |
| 0634306323 | O-RING | Hydraulic seal between housings |
| 0636305026 | SCREW PLUG | Closes oil drain or test ports |
| 4644301279 | SCREEN SHEET | Filters debris from hydraulic fluid |
| 4644301088 | SEALING CAP | Protects sensor openings |
| 4644109044 | PARKING BRAKE | Mechanical lock for output shaft |
| 0501211070 | BRAKE | Friction disc for parking function |
| 0501317036 | PISTON | Hydraulic actuator for brake pack |
