Overview
The ZF 4644.183.057 LOOSE PARTS kit is a critical service component designed for the WG200 series transmission. This genuine OEM assembly includes the necessary fasteners, seals, and small hardware required to secure internal sub-assemblies during a rebuild or overhaul. Specifically, this kit interfaces directly with the 4644101235: TRANSMISSION HOUSING and the 4644301310: TRANSMISSION HOUSING to ensure proper clamping force and alignment of the gear train. The SKU 4644.183.057 is often ordered alongside a new 0730365067: TYPE PLATE to maintain accurate unit identification after service. Without this loose parts set, the 4644106301: SHIFT SYSTEM cannot be correctly torqued, leading to premature wear.
Symptoms of Failure
- Transmission fluid seepage at housing joints: When the loose hardware in kit 4644.183.057 fatigues or corrodes, clamping force drops, causing oil to weep between the main case and the 4644306507: COVER PLATE.
- Intermittent gear engagement or delayed shifts: Worn fasteners allow the shift rail assembly to shift out of tolerance, directly affecting the 4644159302: SHIFT SYSTEM alignment.
- Abnormal rattle or vibration from the bell housing: Loose bolts permit micro-movement of the 4644306560: VALVE BLOCK, creating a distinct metallic chatter under load.
- Hard shifting in cold temperatures: Degraded seals within this kit allow air ingress into the hydraulic circuit, causing spongy or harsh shifts that worsen as the 4644306408: WASHER stack loses its crush tolerance.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4644.183.057 |
| Material Composition | Steel alloy (fasteners) / NBR (seals) |
| Weight (estimated) | 0.85 kg (1.87 lbs) |
| Thread Pitch (primary bolts) | M10 x 1.5 |
| Torque Specification | 45 Nm ± 3 Nm |
| OEM Reference | ZF 4644.183.057 |
| Kit Contents | Bolts, washers, O-rings, lock plates |
Compatibility
This genuine ZF loose parts kit is engineered for the WG200 series, but it also fits the WG180, WG190, and WG210 variants due to shared housing bolt patterns. It is specifically required when servicing the 4644306513: COVER or the 4644306555: COVER on these models. Always verify your transmission serial number against the ZF parts catalog to confirm compatibility with the 4644.183.057 kit.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101235 | TRANSMISSION HOUSING | Main structural case for gear assembly |
| 4644301310 | TRANSMISSION HOUSING | Secondary housing for clutch pack |
| 0730365067 | TYPE PLATE | Identification plate for transmission model |
| 4644106301 | SHIFT SYSTEM | Controls gear selection mechanism |
| 4644306507 | COVER PLATE | Seals the valve body cavity |
| 4644159302 | SHIFT SYSTEM | Secondary shift rail assembly |
| 4644306560 | VALVE BLOCK | Hydraulic control manifold |
| 4644306408 | WASHER | Crush washer for bolt sealing |
| 4644306513 | COVER | Access cover for filter |
| 4644306555 | COVER | End cover for output shaft |
