Overview
The ZF 0636.101.043 CAP SCREW is an OEM genuine fastener engineered specifically for the WG65, WG210, and WG200 series transmissions. This cap screw secures critical internal assemblies within the transmission housing, ensuring that pressure plates and clutch packs remain firmly anchored under high torque loads. As a precision-machined component, the SKU 0636.101.043 is designed to withstand extreme shear forces and thermal cycling. It is often installed alongside the TRANSMISSION HOUSING to maintain structural integrity, and it works in concert with the HEXAGON SCREW to distribute clamping force evenly across mating surfaces.
Symptoms of Failure
- Transmission oil seepage at bolt heads: When the cap screw loses its preload, oil can migrate past the threads, causing visible wet spots around the housing.
- Abnormal gear engagement noise: A loose or fatigued 0636.101.043 allows internal components to shift, producing a distinct clunking sound during acceleration or deceleration.
- Intermittent gear slipping under load: If the cap screw fails to secure the clutch pack assembly, torque transfer becomes inconsistent, leading to momentary power loss.
- Vibration in the driveline at highway speeds: Worn fasteners can cause misalignment between the HOUSING and the HOUSING sections, generating low-frequency vibrations.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0636.101.043 |
| Material | Alloy steel, 10.9 grade, zinc-nickel plated |
| Thread Size | M10 x 1.5 |
| Length | 45 mm |
| Head Type | Hexagon socket, flanged |
| Weight | 0.042 kg |
| OEM Reference | ZF 0636.101.043 |
| Torque Specification | 48 Nm + 90° angle |
Compatibility
This cap screw is a direct OEM replacement for the following ZF transmission models: WG65, WG180, WG200, and WG210 series. It is also used in select WG 200 variants where the bolt pattern requires a flanged cap screw. Always verify thread pitch and length against your existing fastener before installation. For complete assembly, pair this part with the HEXAGON SCREW and the HEXAGON SCREW for auxiliary mounting points.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101066 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 0636011118 | HEXAGON SCREW | Secures valve body to housing |
| 4616301307 | HOUSING | Rear housing section for output shaft |
| 4616301309 | HOUSING | Front housing section for input shaft |
| 0636011038 | HEXAGON SCREW | Fastener for oil pump cover |
| 0636016015 | HEXAGON SCREW | Mounting screw for clutch drum |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for housing halves |
| 0634313118 | O-RING | Seals oil passages between housings |
| 0636304019 | SCREW PLUG | Closes inspection port on housing |
| 0634801152 | SEALING RING | Prevents leaks at threaded connections |
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