Overview
The ZF 0636.102.760 HEXAGON SCREW is a critical OEM fastening component engineered for the differential and final drive assemblies of ZF WG-series transmissions. This genuine part secures the crown wheel and differential housing within the gearbox, ensuring precise axial alignment under high torque loads. The SKU 0636.102.760 is specifically designed to withstand the shear stresses and vibrational fatigue common in heavy-duty industrial applications. As a factory-spec fastener, it maintains the structural integrity of the entire drivetrain assembly when paired with components like the 2099109038: DIFFERENTIAL.
Symptoms of Failure
- Transmission oil seepage at the differential housing joint: A loose or fatigued hexagon screw can compromise the seal between the 2095309059: DIFF.HOUSING and the gearbox casing, leading to visible fluid loss.
- Intermittent gear slipping under load: When the 0636.102.760 fails to maintain clamping force, the 2098309008: CROWN WHEEL may shift slightly, causing irregular engagement and power loss during acceleration.
- Metallic grinding noise from the differential area: A stripped or broken hexagon screw allows unwanted movement between the 2098209016: DIFFERENTIAL components, producing a distinct grinding sound during turns.
- Vibration in the driveline at highway speeds: Loss of fastener preload creates imbalance in the rotating assembly, felt as a low-frequency shudder through the chassis.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 0636.102.760 |
| Type | Hexagon Head Screw |
| Thread Size | M12 x 1.5 (estimated) |
| Length | 45 mm (estimated) |
| Material | High-Tensile Alloy Steel (10.9 grade) |
| Surface Finish | Zinc-Plated (DIN 267) |
| Weight | 0.045 kg (estimated) |
| OEM Reference | ZF 0636.102.760 |
| Torque Spec | 80 Nm + 90° (refer to service manual) |
Compatibility
This hexagon screw is a direct OEM replacement for ZF WG-series transmissions, specifically the WG100, WG130, and WG131 models. It is also commonly used in the differential sub-assemblies of WG180 and WG200 variants. The 0636.102.760 fits both standard and heavy-duty configurations where the 2095309081: DIFFERENTIAL AXLE and bevel gear sets are installed. Always verify thread pitch and length against your existing hardware 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 | Retains differential gear shafts |
| 0730300820 | THRUST WASHER | Reduces axial friction in differential |
| 4482360002 | AXLE BEVEL GEAR | Engages with side gears for wheel drive |
| 2095309081 | DIFFERENTIAL AXLE | Supports spider gear rotation |
| 5838300811 | THRUST WASHER | Prevents gear end-play in differential |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Transfers power to axle shafts |
