Overview
The ZF 0636.104.352 HEXAGON SCREW is a critical fastening element designed for the secure assembly of the WG100, WG130, and WG131 transmission series. This OEM genuine part ensures precise clamping force within the gearbox housing, preventing unwanted movement of internal components under high torque loads. The SKU 0636.104.352 is specifically engineered to maintain the structural integrity of the transmission’s mounting points, directly influencing the alignment of the 4699101097: HOUSING and the 4699102166: INPUT shaft assembly. Without this hexagon screw, the entire drivetrain assembly risks destabilization during operation.
Symptoms of Failure
- Transmission oil seepage at bolt flanges: A worn or stripped hexagon screw cannot maintain proper seal compression, leading to slow oil leaks around the housing mating surfaces.
- Audible rattling from the gearbox bell housing: Loose fasteners allow the 4699103060: OUTPUT shaft to vibrate against its bearings, producing a distinct metallic chatter during gear changes.
- Intermittent gear engagement failure: When the screw fatigues, the 4699003082: GK20 clutch pack shifts out of alignment, causing delayed or incomplete gear selection under load.
- Visible thread galling or corrosion: Exposure to transmission fluid and heat degrades the screw’s surface, making removal difficult and compromising future serviceability.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0636.104.352 |
| Thread Size | M10 x 1.5 (estimated) |
| Length | 35 mm |
| Head Type | Hexagon (6-point) |
| Material | Alloy steel, zinc-plated |
| Weight | 0.04 kg |
| OEM Reference | ZF 0636.104.352 |
| Torque Spec | 45 Nm (factory recommendation) |
Compatibility
This hexagon screw is verified for direct fitment in the following ZF transmission models: WG100, WG130, and WG131. It is also commonly used in the WG180 and WG200 series for secondary mounting points. The part is not interchangeable with metric bolts from non-ZF sources due to its specific thread pitch and hardness rating. Always confirm the screw length against your housing depth to avoid bottoming out.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699003082 | GK20 | Clutch pack assembly for gear selection |
| 4699101097 | HOUSING | Main transmission casing |
| 4699102166 | INPUT | Input shaft and bearing assembly |
| 4699103060 | OUTPUT | Output shaft flange |
| 4699105010 | TURNTABLE BEARING | Rotary support bearing |
| 4699301183 | HOUSING | Secondary housing cover |
| 4699301017 | BEARING COVER | Protective cover for bearing cavity |
| 4699301085 | COVER | Access port cover plate |
| 4699301014 | THREAD PROTECTIVE SHIELD | Thread insert for bolt holes |
| 0634303141 | O-RING | Seal for fluid passages |
