Overview
The ZF 0636.011.055 HEXAGON SCREW is a critical fastening element engineered for secure assembly within the WG100, WG130, and WG131 transmission series. This OEM genuine part ensures precise clamping force when mounting internal components such as the 2094101017 TRANSMISSION HOUSING and the 2094301069 HOUSING. Designed to withstand high torque and vibration, the hexagon screw (SKU 0636.011.055) maintains structural integrity in the valve body and clutch assembly areas. Its hexagonal head allows for reliable tool engagement during installation, reducing the risk of stripping or over-torquing. This fastener is a direct replacement for worn or damaged screws, restoring factory-level clamping force and preventing misalignment of adjacent components.
Symptoms of Failure
- Transmission fluid seepage at housing joints: A loose or fatigued hexagon screw can cause the 2094298054 HOUSING to separate slightly, leading to oil leaks around the mating surfaces. This often appears as wet spots near the bell housing or pan rail.
- Intermittent gear engagement hesitation: When the screw fails to maintain proper tension, internal components shift, causing delayed or rough shifting between gears. Drivers may notice a “clunk” when accelerating from a stop.
- Abnormal vibration during torque converter lockup: A stripped or broken hexagon screw allows the housing to flex, transmitting vibration through the drivetrain. This symptom is most pronounced at highway speeds under light load.
- Persistent low oil pressure warnings: If the screw loosens near the oil pump or valve body, hydraulic pressure drops, triggering dashboard alerts and potential clutch slippage.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 0636.011.055 |
| Head Type | Hexagon (External Hex) |
| Thread Size | M10 x 1.5 (estimated) |
| Length | 35 mm (estimated) |
| Material | Steel, zinc-plated (OEM spec) |
| Weight | 0.04 kg (approx.) |
| OEM Reference | ZF 0636.011.055 |
| Torque Spec | 45 Nm (factory recommendation) |
Compatibility
This hexagon screw is specifically designed for ZF WG-series transmissions, including the WG100, WG130, and WG131 models. It is also compatible with the WG180 and WG200 variants when used in similar housing fastening points. The screw interfaces directly with the 0636302008 SCREW PLUG in certain oil gallery applications. For complete assembly, verify fitment with the transmission housing casting numbers. Always replace screws in sets when servicing the valve body or clutch pack to ensure uniform clamping force.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2094101017 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 2094301069 | HOUSING | Intermediate housing for valve body |
| 2094298054 | HOUSING | Rear housing for output shaft support |
| 0636302008 | SCREW PLUG | Seals oil passages in housing |
| 0634801165 | SEALING RING | Prevents fluid bypass at screw joints |
| 0635460022 | BALL | Check ball for valve body circuits |
| 2094301071 | COVER | Access cover for clutch pack |
| 2094301030 | GASKET | Seals housing mating surfaces |
| 0750111371 | SHAFT SEAL | Prevents output shaft leakage |
| 0634303085 | O-RING | Hydraulic seal for piston circuits |
