Overview
The ZF 0636.010.212 HEXAGON SCREW is a critical fastening component engineered specifically for the WG181 and WG65 transmission series. This OEM genuine part secures the 4616105415: OUTPUT assembly within the transmission housing, ensuring precise alignment and clamping force under high torque loads. As a hexagon-headed bolt, it provides reliable retention for the 4616303144: OUTPUT FLANGE and the 4616101094: TRANSMISSION HOUSING. The SKU 0636.010.212 is a direct replacement for the original factory part, manufactured to ZF’s exacting tolerances for thread pitch, tensile strength, and corrosion resistance.
Symptoms of Failure
- Oil seepage around the output flange: A loose or fatigued hexagon screw can compromise the seal between the output flange and housing, leading to visible transmission fluid leaks near the rear of the unit.
- Gear engagement hesitation or slipping: When this screw loses clamping force, the output shaft assembly may shift slightly, causing delayed engagement or intermittent slipping during acceleration.
- Abnormal vibration from the driveline: A worn or stripped 0636.010.212 screw allows micro-movement of the output components, generating low-frequency vibrations that intensify under load.
- Metallic debris in transmission fluid: Progressive loosening can cause the screw head to contact internal surfaces, shedding metal particles that contaminate the hydraulic system.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 0636.010.212 |
| Thread Size | M12 x 1.75 |
| Length | 45 mm |
| Head Type | Hexagon (6-point) |
| Material | High-tensile steel, zinc-plated |
| Weight | 0.045 kg |
| OEM Reference | ZF 0636.010.212 |
| Torque Specification | 85 Nm (factory spec) |
Compatibility
This hexagon screw is primarily designed for the WG 181 Series and WG 65 Series transmissions. It also fits select models in the WG180, WG200, and WG210 families where the output flange mounting pattern matches the M12 thread configuration. Always verify thread pitch and length against your specific transmission variant. For related fasteners, consider the 0636011038: HEXAGON SCREW for adjacent mounting points.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105415 | OUTPUT | Transfers torque from transmission to driveline |
| 4616303144 | OUTPUT FLANGE | Connects output shaft to universal joint |
| 4616101094 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 0636011038 | HEXAGON SCREW | Secures intermediate housing sections |
| 0636011118 | HEXAGON SCREW | Fastens bearing retainer plate |
| 0636016015 | HEXAGON SCREW | Clamps oil pump assembly |
| 0631306085 | CYLINDRICAL PIN | Aligns housing halves during assembly |
| 0634313118 | O-RING | Seals output flange joint |
| 0732611049 | FILTER INSERT | Traps debris in hydraulic circuit |
| 0634303718 | O-RING | Seals housing cover interface |
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