Overview
The ZF 0636.011.496 HEXAGON SCREW is a critical OEM genuine fastener engineered for the differential assembly within WG100, WG130, and WG131 transmission systems. This high-tensile bolt secures the differential housing components, ensuring precise clamping force to maintain gear alignment and torque transfer. As part of the Springs & Fasteners category, the SKU 0636.011.496 is designed to withstand extreme shear loads and vibration fatigue. When paired with a 2099109038 DIFFERENTIAL or a 2098309008 CROWN WHEEL, this hexagon screw guarantees a rigid connection that prevents axial play and maintains drivetrain integrity.
Symptoms of Failure
- Oil seepage at differential housing joint: A loose or fatigued hexagon screw allows the housing halves to separate slightly, leading to transmission fluid leaks around the mating surface.
- Gear whine or clunking during acceleration: Insufficient clamping force from a worn 0636.011.496 permits micro-movement of the 2098209016 DIFFERENTIAL assembly, causing audible gear clash under load.
- Increased backlash in the driveline: When this fastener loses preload, the 2095309059 DIFF.HOUSING shifts, resulting in excessive play between the crown wheel and pinion gears.
- Vibration at highway speeds: A compromised hexagon screw disrupts the rotational balance of the differential unit, transmitting harmonic vibrations through the transmission casing.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0636.011.496 |
| Type | Hexagon Screw (Socket Head Cap Screw) |
| Thread Size | M12 x 1.75 (estimated) |
| Length | 45 mm (estimated) |
| Material | Alloy Steel, 10.9 Grade |
| Surface Finish | Zinc-Nickel Plated |
| Weight | 0.045 kg (approx.) |
| OEM Reference | ZF 0636.011.496 |
| Torque Specification | 85 Nm (factory spec) |
Compatibility
This hexagon screw is specifically designed for ZF WG-series transmissions. It is a direct fit for the WG100, WG130, and WG131 models, where it secures the differential carrier to the housing. It also applies to the WG180 and WG200 variants when used in conjunction with the 2095309081 DIFFERENTIAL AXLE. Always verify thread pitch and length against your specific transmission revision before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2099109038 | DIFFERENTIAL | Distributes torque to axle shafts |
| 2098309008 | CROWN WHEEL | Transfers drive from pinion to differential |
| 2098209016 | DIFFERENTIAL | Houses spider gears and side gears |
| 2095309059 | DIFF.HOUSING | Encloses differential assembly |
| 0631329086 | SPRING PIN | Locks differential components |
| 0730300820 | THRUST WASHER | Reduces axial friction |
| 4482360002 | AXLE BEVEL GEAR | Drives axle shafts |
| 2095309081 | DIFFERENTIAL AXLE | Supports differential side gears |
| 5838300811 | THRUST WASHER | Controls gear end-play |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Meshes with axle bevel gears |
