Overview
The ZF 0636.011.444 HEXAGON SCREW is a critical fastening component engineered specifically for the WG100, WG130, and WG131 transmission series. This OEM genuine part secures the 2094101017: TRANSMISSION HOUSING assembly, ensuring precise clamping force to maintain internal clearances and prevent fluid migration. As a hexagon-headed fastener, it provides reliable torque retention in high-vibration environments, directly influencing the structural integrity of the gear train. The SKU 0636.011.444 is manufactured to ZF’s exacting tolerances, making it a direct replacement for worn or damaged bolts in these heavy-duty transmissions.
Symptoms of Failure
- Transmission oil seepage at housing joints: When the 0636.011.444 hexagon screw loses its clamping load, gaps form between the 2094301069: HOUSING sections, leading to visible oil weeping around the bolt heads.
- Abnormal gear rattle or whine under load: A loose or stripped hexagon screw allows the 2094298054: HOUSING to shift slightly, altering gear mesh patterns and producing audible noise during acceleration.
- Intermittent gear engagement hesitation: Insufficient fastener torque causes micro-movement in the housing, which can delay clutch pack engagement and create a slipping sensation during shifts.
- Visible corrosion or thread galling: Exposure to heat cycles and transmission fluid can degrade the screw’s surface, making removal difficult and compromising future serviceability.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 0636.011.444 |
| Head Type | Hexagon (External Hex) |
| Thread Size | M10 x 1.5 (estimated) |
| Length | 35 mm (estimated) |
| Material | Alloy Steel, Zinc-Plated |
| Weight | 0.04 kg (approx.) |
| OEM Reference | ZF 0636.011.444 |
| Grade | 10.9 (estimated) |
Compatibility
This hexagon screw is designed for ZF’s WG-series transmissions, specifically the WG100, WG130, and WG131 models. It is also commonly used in the WG180 and WG200 series where identical housing fastening points exist. The 0636.011.444 part is a direct replacement for original equipment screws in these gearboxes, ensuring proper clamping of the 0636302008: SCREW PLUG and adjacent housing components. Always verify thread pitch and length against your specific transmission variant before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2094101017 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 2094301069 | HOUSING | Secondary housing section for clutch packs |
| 2094298054 | HOUSING | Rear housing cover assembly |
| 0636302008 | SCREW PLUG | Seals oil passages in housing |
| 0634801165 | SEALING RING | Prevents fluid leaks at joints |
| 0635460022 | BALL | Check valve component in oil circuit |
| 2094301071 | COVER | Protects internal components from debris |
| 2094301030 | GASKET | Creates fluid-tight seal between housings |
| 0750111371 | SHAFT SEAL | Prevents oil leakage at rotating shafts |
| 0634303085 | O-RING | Seals hydraulic pressure ports |
