Overview
The ZF 0636.101.276 CAP SCREW is a critical fastening component engineered specifically for the WG 65 Series transmission. This OEM genuine part secures the transmission housing assembly, ensuring precise clamping force and structural integrity under high-torque conditions. As a cap screw, it provides a flush, sealed fit that prevents contaminants from entering the gear train. The SKU 0636.101.276 is manufactured to ZF’s exacting tolerances, making it essential for maintaining oil pressure and gear alignment within the WG65 planetary system. When replacing this fastener, always pair it with a new 0634313118: O-RING to guarantee a leak-free seal.
Symptoms of Failure
- Transmission oil seepage around the housing bolts: A worn or stretched cap screw can lose its torque retention, leading to slow oil leaks that accumulate on the bell housing exterior.
- Gear slipping under load in WG65 units: Insufficient clamping force from a degraded 0636.101.276 allows the 4616101059: TRANSMISSION HOUSING to shift microscopically, causing intermittent power loss.
- Abnormal vibration during gear engagement: A loose cap screw permits micro-movement of the housing, transmitting vibration through the driveline at specific RPM ranges.
- Increased metallic debris in the oil filter: When the cap screw fails catastrophically, fragments can circulate, often detected during routine filter changes alongside the 0732611049: FILTER INSERT.
Technical Specifications
| Part Number | 0636.101.276 |
| Type | Cap Screw (Hexagon Socket Head) |
| 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 0636.101.276 |
| Torque Specification | 85 Nm + 90° angle |
Compatibility
This cap screw is primarily designed for the WG 65 Series transmission family. Based on its thread pattern and length, it is also compatible with the following ZF models: WG180, WG200, and WG250 when used in housing-to-converter applications. For proper installation, always use the matching 0636011038: HEXAGON SCREW for adjacent mounting points, and verify alignment with the 0636011118: HEXAGON SCREW for the oil pan. In high-vibration environments, replace the 0636016015: HEXAGON SCREW simultaneously to maintain uniform clamping.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101059 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 0636011038 | HEXAGON SCREW | Secures valve body to housing |
| 0636011118 | HEXAGON SCREW | Fastens oil pan to lower housing |
| 0636016015 | HEXAGON SCREW | Mounts torque converter bell housing |
| 0631306085 | CYLINDRICAL PIN | Aligns housing halves during assembly |
| 0634313118 | O-RING | Seals cap screw head to prevent leaks |
| 0636304019 | SCREW PLUG | Closes oil drain or fill ports |
| 0634801152 | SEALING RING | Provides static seal under screw plug |
| 0732611049 | FILTER INSERT | Captures debris from circulating oil |
| 0634303718 | O-RING | Seals filter housing to transmission case |
