Overview
The ZF 4642.306.103 INTERMEDIATE PLATE is a critical structural component within the WG181 series transmission. It serves as the central separator between the torque converter housing and the main gearbox casing, providing precise alignment for the oil pump and clutch packs. This OEM genuine part (SKU: 4642.306.103) ensures that hydraulic pressure channels remain sealed and that rotating assemblies maintain their correct axial clearance. Without this plate, the transmission cannot maintain proper oil flow or gear engagement integrity.
Symptoms of Failure
- Oil leaks between transmission housing sections: A warped or cracked intermediate plate causes fluid to seep past the gasket surface, often visible as drips near the bell housing joint.
- Erratic gear engagement or slipping: When the plate loses its flatness, clutch pack clearance changes, leading to delayed shifts or partial engagement under load.
- Unusual whining or grinding noises: Misalignment from a damaged plate puts stress on the TRANSMISSION HOUSING and pump gears, generating metallic sounds during acceleration.
- Low transmission fluid pressure warnings: Cracks in the plate disrupt internal oil galleries, causing pressure drops that trigger dashboard alerts.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4642.306.103 |
| Material | High-strength aluminum alloy (EN AC-42100) |
| Outer Diameter | 380 mm |
| Thickness | 18.5 mm |
| Weight | 2.4 kg |
| OEM Reference | ZF 4642.306.103 |
| Bolt Hole Pattern | 12 x M10 on 340 mm PCD |
| Sealing Surface Finish | Ra 0.8 µm |
Compatibility
This intermediate plate is specifically engineered for the ZF WG181 series. It also fits the closely related WG180 and WG200 models due to shared bell housing bolt patterns and pump mounting dimensions. For WG182 and WG210 variants, verify the oil gallery alignment before installation. The plate interfaces directly with the HOUSING and secures via a THREADED BUSH to prevent rotational creep. Always confirm your transmission’s serial number against the TYPE PLATE before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101047 | TRANSMISSION HOUSING | Main casing enclosing gear sets and clutches |
| 4644301380 | HOUSING | Torque converter bell housing section |
| 4644301189 | THREADED BUSH | Alignment dowel for plate positioning |
| 0730365067 | TYPE PLATE | Identification tag with transmission specs |
| 0631311009 | GROOVED STUD | Locating pin for housing alignment |
| 4644301161 | COVER PLATE | Access cover for valve body inspection |
| 0636100621 | HEXAGON SCREW | M10 bolt for plate-to-housing fastening |
| 0631610020 | SET SCREW | Adjustable stop for shift fork travel |
| 0634801098 | SEALING RING | O-ring for oil passage sealing |
| 4644301117 | FIXING PLATE | Retainer for intermediate plate bolts |
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