Overview
The ZF 0636.015.355 HEXAGON SCREW is a critical fastening component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part secures internal assemblies within the transmission housing, ensuring precise alignment of gear sets and bearing preload. As a structural fastener, it withstands high torsional loads and thermal cycling. The SKU 0636.015.355 is specifically designed to mate with the 5838300626: DIFFERENTIAL HOUSING and the 5838109012: DIFFERENTIAL assembly, locking these units into their operational positions within the transmission case.
Symptoms of Failure
- Transmission oil seepage at housing joints: When the hexagon screw loosens or fatigues, it can compromise the seal between the differential housing and the main case, leading to slow oil leaks that worsen over time.
- Gear engagement clunking under load: A worn 0636.015.355 screw allows micro-movement of the 0750117075: TAPER ROLLER BEARING seat, causing audible clunks during acceleration or deceleration.
- Vibration in the driveline during highway speeds: Loss of clamping force from this fastener permits axial play in the 2093209023: DIFFERENTIAL assembly, transmitting vibration through the transmission mount.
- Intermittent gear slipping in WG100/WG130 units: As the screw loosens, the differential carrier shifts slightly, causing intermittent loss of torque transfer to the output shaft.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 0636.015.355 |
| Type | Hexagon Screw (Socket Head Cap Screw) |
| Thread Size | M12 x 1.75 |
| Length | 45 mm |
| Material | Alloy Steel, 10.9 Grade |
| Surface Finish | Zinc-Nickel Plated (Corrosion Resistant) |
| Weight | 0.045 kg |
| OEM Reference | ZF 0636.015.355 |
| Torque Spec | 85 Nm + 90° angle |
Compatibility
This hexagon screw is factory-specified for ZF WG100, WG130, and WG131 series transmissions. It also applies to the WG180 and WG200 variants when used in differential housing retention. Always verify the thread pitch and length against your specific transmission model. The screw works in concert with the 5838300626: DIFFERENTIAL HOUSING and the 5838109012: DIFFERENTIAL assembly for proper installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | DIFFERENTIAL | Distributes torque to axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports differential carrier rotation |
| 2093209023 | DIFFERENTIAL | Secondary differential unit for multi-axle |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses differential gear set |
| 0631329088 | SPRING PIN | Locks shift fork to rail |
| 5838300811 | THRUST WASHER | Reduces axial friction in differential |
| 5838300721 | AXLE BEVEL GEAR | Transfers power to axle shafts |
| 5838300633 | AXLE | Drives wheel hubs |
| 5838300753 | THRUST WASHER | Spacer for differential side gears |
| 5838300818 | THRUST WASHER | Bearing surface for pinion gear |
Frequently Asked Questions
Q: Can I reuse the 0636.015.355 hexagon screw after removal?
A: ZF recommends replacing this screw with a new OEM part (0636.015.355) after any disassembly. The screw is torque-to-yield and loses clamping force upon reuse, risking loosening under vibration.
Q: Does this screw fit the WG180 transmission?
A: Yes, the WG180 uses the same differential housing retention pattern as the WG100/WG130 series. However, always cross-reference your transmission serial number to confirm thread pitch and length compatibility.
Q: What tools are needed to install this hexagon screw?
A: A 12-point socket (18 mm) and a calibrated torque wrench capable of 85 Nm are required. An angle gauge is also needed for the final 90° turn to achieve proper preload.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
