Overview
The ZF 0636.011.429 HEXAGON SCREW is a critical fastening component engineered specifically for the WG200 series transmission assembly. This OEM genuine part secures the hydraulic control unit and valve body housing within the transmission casing, ensuring precise alignment under high-torque conditions. The SKU 0636.011.429 is manufactured to ZF’s exacting tolerances, providing the necessary clamping force to maintain internal fluid pressure integrity. Without this hexagon screw, the transmission’s internal components risk shifting, leading to operational instability.
Symptoms of Failure
- Transmission fluid seepage around the valve body cover: A worn or stripped 0636.011.429 hexagon screw cannot maintain a proper seal, causing slow oil leaks that leave puddles under the vehicle.
- Intermittent gear engagement hesitation: When this screw loosens, the valve body shifts slightly, resulting in delayed or harsh shifting between gears during acceleration.
- Unusual metallic rattling from the transmission pan: A loose hexagon screw vibrates against the housing, producing a distinct noise that worsens as RPMs increase.
- Erratic clutch pack pressure: Failure of this fastener disrupts hydraulic flow to the clutch packs, leading to slipping under load and eventual transmission overheating.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 0636.011.429 |
| Type | Hexagon Screw (Socket Head Cap) |
| Thread Size | M10 x 1.5 |
| Length | 45 mm |
| Head Diameter | 16 mm |
| Material | High-tensile steel, zinc-plated |
| Weight | 0.04 kg (40 g) |
| OEM Reference | ZF 0636.011.429 |
| Torque Specification | 45 Nm (33 ft-lbs) |
Compatibility
This hexagon screw is designed for the ZF WG200 transmission series, including the WG180, WG200, and WG210 variants. It is also compatible with select ZF Ecomat 4HP and 5HP models that share the same valve body mounting pattern. Always verify the thread pitch and length against your transmission’s service manual before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4460165051 | CONSOLE | Supports the transmission control module |
| 4460368311 | CONSOLE | Mounting bracket for hydraulic lines |
| 0730100365 | WASHER | Seals the hexagon screw interface |
| 4644105418 | DISCONNECTION | Disconnects torque converter lockup |
| 4644305041 | ADAPTER | Converts fluid ports for cooler lines |
| 4460068159 | AXLE DRIVE | Transfers power to differential |
| 4460168651 | INPUT FLANGE | Connects driveshaft to transmission |
| 4460368318 | FLANGE | Output shaft coupling component |
| 4460368317 | DUST PROTECTION | Shields input shaft from debris |
| 0636020265 | HEXAGON SCREW | Alternate thread pitch variant |
