Overview
The ZF 0636.011.058 HEXAGON SCREW is a critical fastening component engineered specifically for the WG 65 series transmission assembly. This OEM genuine part secures the transmission housing and internal valve body sections, ensuring precise clamping force under high-torque operating conditions. As a factory-specified hexagon screw, part number 0636.011.058 maintains the structural integrity of the gear train by preventing relative movement between mated surfaces. This fastener is commonly installed alongside the 4616101059: TRANSMISSION HOUSING, which provides the rigid enclosure for all rotating elements. The screw’s thread geometry is optimized for repeated thermal cycling without loss of preload.
Symptoms of Failure
- Transmission oil seepage at bolt bosses: When the 0636.011.058 hexagon screw loses clamping tension, fluid can migrate past the sealing interface, causing visible drips around the housing perimeter.
- Abnormal gear engagement noise: A loose hexagon screw allows micro-movement of the housing, producing a rhythmic clicking or knocking sound during acceleration.
- Intermittent gear slipping under load: Insufficient fastener torque permits slight housing flex, disrupting shift timing and causing momentary power loss in the WG65.
- Increased vibration at highway speeds: Worn threads or stripped heads on this screw lead to uneven housing clamping, transmitting driveline vibration into the chassis.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 0636.011.058 |
| Thread Size | M10 x 1.5 |
| Overall Length | 45 mm |
| Head Type | Hexagon (12-point drive) |
| Material | Alloy steel, 10.9 grade |
| Surface Finish | Zinc-nickel plated |
| Weight | 0.042 kg |
| OEM Reference | ZF 0636.011.058 |
| Torque Specification | 48 Nm + 90° angle |
Compatibility
This hexagon screw is primarily designed for the ZF WG 65 series, but it also fits select models in the broader WG family due to shared housing architecture. Verified compatible transmissions include WG65, WG120, WG180, and WG200. The 0636.011.058 is used in both forward and reverse clutch housing attachments. For related fasteners in the same assembly, consider the 0636011038: HEXAGON SCREW (shorter shank) and the 0636011118: HEXAGON SCREW (flanged head). The 0636016015: HEXAGON SCREW is used for oil pan retention in the same series.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101059 | TRANSMISSION HOUSING | Main structural enclosure for gear sets |
| 0636011038 | HEXAGON SCREW | Short shank fastener for valve body |
| 0636011118 | HEXAGON SCREW | Flanged head screw for clutch packs |
| 0636016015 | HEXAGON SCREW | Oil pan retention fastener |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for housing halves |
| 0634313118 | O-RING | Seals screw boss against fluid leaks |
| 0636304019 | SCREW PLUG | Closes hydraulic test ports |
| 0634801152 | SEALING RING | Copper washer for plug sealing |
| 0732611049 | FILTER INSERT | Internal oil filtration element |
| 0634303718 | O-RING | Filter housing seal |
