Overview
The ZF 0636.101.071 CAP SCREW is a critical fastening component engineered specifically for the WG 200 series transmission assembly. This OEM genuine part secures the 4108101108: HOUSING to the main gear casing, ensuring precise alignment and clamping force under high-torque conditions. The SKU 0636.101.071 functions as a load-bearing fastener that maintains structural integrity within the transmission’s hydraulic circuit, preventing fluid bypass and maintaining system pressure. Without this cap screw, the housing cannot achieve the necessary seal against the 4108306172: GASKET, leading to performance degradation.
Symptoms of Failure
- Hydraulic oil seepage around housing flange: A worn or stripped 0636.101.071 cap screw cannot maintain proper torque, causing the gasket to fail and oil to weep from the joint.
- Transmission gear slipping under load: When this fastener loosens, the housing shifts slightly, misaligning the 4108301436: INPUT SHAFT and causing intermittent power loss.
- Abnormal vibration or rattling from the bell housing: A loose cap screw allows the housing to vibrate against the casing, producing a distinct metallic noise during acceleration.
- Difficulty engaging reverse or low gears: Insufficient clamping force from a fatigued cap screw can alter the housing’s position, affecting shift fork travel and gear engagement.
Technical Specifications
| Part Number | 0636.101.071 |
| Thread Size | M10 x 1.5 (estimated) |
| Length | 35 mm (estimated) |
| Head Type | Hexagonal socket, flanged |
| Material | Alloy steel, zinc-plated |
| Weight | 0.045 kg (estimated) |
| OEM Reference | ZF 0636.101.071 |
| Torque Specification | 45 Nm (estimated) |
Compatibility
This cap screw is primarily designed for the WG 200 series transmissions, including models WG200, WG210, and WG220. It also fits select WG180 variants where the housing bolt pattern matches. The 0636.101.071 is used in conjunction with the 0730365280: TYPE PLATE for correct identification during assembly. Always verify thread pitch and length against your specific transmission model before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4108101108 | HOUSING | Encloses gear train and supports input shaft |
| 4108306172 | GASKET | Seals housing-to-casing interface |
| 0730365280 | TYPE PLATE | Identifies transmission model and specs |
| 4108301436 | INPUT SHAFT | Transfers engine torque into transmission |
| 0735330931 | BALL BEARING | Supports rotating shaft assembly |
| 0630532160 | RETAINING RING | Secures bearing in housing bore |
| 0630531130 | RETAINING RING | Locks shaft in axial position |
| 0636302014 | SCREW PLUG | Closes hydraulic port access |
| 0634801057 | SEALING RING | Prevents fluid leaks at plug interface |
| 4475280018 | SCREW PLUG | Seals pressure test point |
