Overview
The ZF 4644.306.504 DUCT PLATE is a precision-engineered internal component designed specifically for the WG 201 series transmission. This OEM genuine part functions as a critical fluid routing guide, directing transmission oil flow within the valve body assembly to maintain proper hydraulic pressure and lubrication. The SKU 4644.306.504 ensures exact fitment and performance, preventing cross-contamination between separate hydraulic circuits. When installed alongside the 4644101160 TRANSMISSION HOUSING, this duct plate creates a sealed channel system that optimizes shift quality and thermal regulation.
Symptoms of Failure
- Erratic shifting and gear slipping – A worn or cracked duct plate disrupts oil flow, causing delayed engagement or unexpected gear changes during acceleration.
- Transmission overheating – Restricted fluid pathways force the system to work harder, leading to elevated operating temperatures and potential thermal damage.
- Hydraulic pressure loss – Internal leaks around the duct plate reduce line pressure, resulting in soft shifts and reduced torque converter lockup efficiency.
- Visible oil seepage – Cracks or warping in the plate allow fluid to escape past the 0634306198 O-RING, leaving residue on the transmission exterior.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4644.306.504 |
| Material | High-strength aluminum alloy with corrosion-resistant coating |
| Dimensions | 185 mm x 95 mm x 8 mm |
| Weight | 0.42 kg |
| OEM Reference | ZF WG 201 Series |
| Sealing Surface | Precision-machined flatness tolerance ±0.05 mm |
Compatibility
This duct plate is engineered for the ZF WG 201 transmission series, with confirmed compatibility across WG180, WG200, and WG210 models. It integrates directly with the 4644301323 TRANSMISSION HOUSING and requires the 4644301189 THREADED BUSH for secure mounting. The plate also works in conjunction with the 4475280043 SCREW PLUG to seal auxiliary ports. For complete assembly, verify your transmission model number against the OEM parts catalog to ensure proper fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101160 | TRANSMISSION HOUSING | Main structural casing for gear and valve body assembly |
| 4644301323 | TRANSMISSION HOUSING | Secondary housing section for clutch pack support |
| 4644301189 | THREADED BUSH | Provides threaded anchor points for duct plate fasteners |
| 4475280043 | SCREW PLUG | Seals unused hydraulic ports in the valve body |
| 0634306198 | O-RING | Creates fluid-tight seal between duct plate and housing |
| 0730365067 | TYPE PLATE | Identification label with transmission model and serial number |
| 4644301161 | COVER PLATE | Protective shield over duct plate access area |
| 0636100621 | HEXAGON SCREW | Fastener for securing duct plate to housing |
| 0631610020 | SET SCREW | Adjustable stop for pressure regulation |
| 0501218540 | BREATHER | Vents internal pressure to prevent seal damage |
