Overview
The ZF 0636.011.630 HEXAGON SCREW is a critical fastening component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part secures the 2094101012 TRANSMISSION HOUSING assembly, ensuring precise clamping force to maintain internal gear alignment and hydraulic pressure integrity. As a hexagon-headed bolt, it resists vibrational loosening in high-torque environments. The SKU 0636.011.630 is specifically designed to mate with the 2094301036 HOUSING and 2094298057 HOUSING sub-assemblies, forming a leak-proof seal when paired with the 2094301071 COVER.
Symptoms of Failure
- Transmission fluid seepage at housing joints: A loose or corroded 0636.011.630 screw allows oil to escape past the gasket, creating visible drips under the bell housing.
- Intermittent gear engagement hesitation: When this fastener loses torque, the housing shifts minutely, causing delayed clutch pack engagement during upshifts.
- Metallic rattling from the transmission pan area: A stripped hex head or fatigued shank permits the 2094301036 HOUSING to vibrate against the main casing, producing a distinct chatter at idle.
- Progressive oil loss after highway driving: Thermal cycling weakens the screw’s grip, leading to gradual weeping from the 2094298057 HOUSING interface.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0636.011.630 |
| Type | Hexagon Screw (DIN 933 / ISO 4017) |
| Thread Size | M10 x 1.5 (estimated) |
| Length | 30 mm (estimated) |
| Material | Steel, zinc-plated (10.9 grade) |
| Weight | 0.025 kg (approx.) |
| OEM Reference | ZF 0636.011.630 |
| Torque Spec | 45 Nm (factory recommendation) |
Compatibility
This hexagon screw is validated for the following ZF transmission models: WG100, WG130, WG131. It also fits select variants of the WG180 and WG200 series where the housing bolt pattern matches the M10 thread pitch. Always verify thread engagement depth with the 2094301071 COVER before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2094101012 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 2094301036 | HOUSING | Intermediate housing for valve body |
| 2094298057 | HOUSING | Rear housing for output shaft |
| 2094301071 | COVER | Sealing cover for housing access port |
| 0750111371 | SHAFT SEAL | Prevents oil leakage at rotating shafts |
| 0634303085 | O-RING | Static seal for housing flanges |
| 2094301030 | GASKET | Paper gasket for housing mating surfaces |
| 0631306670 | CYLINDRICAL PIN | Alignment dowel for housing positioning |
| 0636011356 | HEXAGON SCREW | Alternate length screw for deep pockets |
| 4475280060 | SCREW PLUG | Seals hydraulic test ports |
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