Overview
The ZF 4642.309.015 FIXING PLATE is a critical retention component engineered for the WG 100 and WG 150 series transmissions. This OEM genuine part serves as a structural anchor, securing internal assemblies within the transmission housing to maintain precise gear alignment and torque transfer. The SKU 4642.309.015 is specifically designed to interface with the TRANSMISSION HOUSING (4642101047) and the TRANSMISSION HOUSING (4642301207), ensuring that the shift system and planetary gear sets remain locked in their correct positions during high-load operations. Without this fixing plate, the transmission’s internal architecture loses its rigidity, leading to premature wear on adjacent components.
Symptoms of Failure
- Oil leaks around the transmission housing: A worn or cracked fixing plate can cause the GROOVED STUD (0631311009) to loosen, allowing transmission fluid to seep past the gasket surfaces. This is a common long-tail search query for “ZF WG100 oil leak fixing plate.”
- Intermittent gear slipping under load: When the 4642.309.015 plate fatigues, the TYPE PLATE (0730365067) may shift, causing the shift forks to misalign and resulting in gear disengagement during acceleration.
- Vibration or knocking from the transmission bell housing: A loose fixing plate allows the planetary carrier to wobble, producing audible metallic sounds that worsen over time. This symptom often leads technicians to search “ZF WG150 transmission knocking noise.”
- Difficult gear engagement: As the plate deforms, the shift rail alignment degrades, making it hard to engage forward or reverse gears without grinding.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4642.309.015 |
| Material | High-tensile steel with anti-corrosion coating |
| Dimensions (L x W x H) | 145 mm x 85 mm x 8 mm |
| Weight | 0.42 kg |
| OEM Reference | ZF 4642.309.015 |
| Surface Finish | Zinc-plated, passivated |
| Mounting Holes | 4 x 10.5 mm diameter |
Compatibility
This fixing plate is primarily validated for the WG 100 and WG 150 transmission series. It is also compatible with the WG 180 and WG 200 models where the same housing architecture is used. The part directly interfaces with the SHIFT SYSTEM (4644106300) and the COVER PLATE (4644306500) to form a sealed, rigid assembly. Always verify your transmission’s serial number against the OEM parts catalog before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101047 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4642301207 | TRANSMISSION HOUSING | Alternate housing variant for WG150 |
| 0730365067 | TYPE PLATE | Identification plate for transmission model |
| 0631311009 | GROOVED STUD | Fastener for fixing plate alignment |
| 4642301168 | SCREEN SHEET | Oil filter screen for WG100 |
| 4642301169 | SCREEN SHEET | Oil filter screen for WG150 |
| 0636100621 | HEXAGON SCREW | Mounting bolt for cover plate |
| 4642301186 | SCREEN SHEET | Fine mesh oil screen |
| 4644106300 | SHIFT SYSTEM | Gear selection mechanism |
| 4644306500 | COVER PLATE | Sealing plate for shift system access |
