Overview
The ZF 0636.103.273 CAP SCREW is a critical fastening component engineered for the WG200, WG92, and WG98 series transmissions. This OEM genuine part secures the TRANSMISSION HOUSING assembly, ensuring precise clamping force to maintain internal gear alignment and hydraulic pressure integrity. The SKU 0636.103.273 is specifically designed to withstand high torsional loads and thermal cycling within the transmission casing, preventing loosening during heavy-duty operations. When installed correctly, this cap screw works in concert with the HOUSING to create a sealed environment for the planetary gear sets and clutch packs.
Symptoms of Failure
- Transmission fluid seepage at bolt heads: A worn or stripped 0636.103.273 cap screw cannot maintain proper sealing torque, leading to oil weeping around the housing perimeter.
- Gear engagement hesitation or slipping: When this fastener loses clamping force, the RANGE SELECTOR mechanism may shift out of alignment, causing delayed shifts or unexpected neutral conditions.
- Abnormal vibration or rattle from the bell housing: A loose cap screw allows micro-movement between the transmission housing and PERIPHERALS, generating audible noise under load.
- Increased operating temperature: Failed fasteners can cause internal fluid bypass, reducing lubrication efficiency and raising thermal stress on the TRANSMISSION HOUSING.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0636.103.273 |
| Thread Size | M10 x 1.5 (estimated) |
| Length | 45 mm (estimated) |
| Head Type | Hexagon socket (Allen) |
| Material | Alloy steel, zinc-plated |
| Weight | 0.035 kg (estimated) |
| OEM Reference | ZF 0636.103.273 |
| Torque Specification | 45 Nm (estimated) |
Compatibility
This cap screw is validated for use in ZF WG180, WG200, WG92, and WG98 series transmissions. It is a direct replacement for the OEM fastener found in the main housing bolt circle, securing the HOUSING to the torque converter bell. The 0636.103.273 also fits select WG210 variants where the TRANSMISSION HOUSING uses identical thread patterns. Always verify the bolt pattern against your specific transmission serial number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660198001 | PERIPHERALS | External sensor and actuator mounting bracket |
| 0501209818 | RANGE SELECTOR | Controls gear ratio engagement |
| 4660101011 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4660301018 | HOUSING | Rear housing section for output shaft |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0769123894 | TYPE PLATE | Identification tag for transmission model |
| 4660221012 | SUCTION TUBE | Oil pickup tube for hydraulic pump |
| 0634100317 | O-RING | Seal for suction tube connection |
| 0750100022 | SCREW PLUG | Drain or fill port closure |
| 4660101804 | TRANSMISSION HOUSING | Alternative housing variant for WG200 |
