Overview
The ZF 0631.100.167 SET SCREW is a precision-engineered OEM genuine fastening component designed specifically for the WG90 and WG94 series transmissions. This set screw plays a critical role in securing internal assemblies within the gearbox, ensuring that key components such as the 4661101020 TRANSMISSION HOUSING and the 4661301046 HOUSING II remain properly aligned under high torque and vibration. As an OEM part, SKU 0631.100.167 guarantees exact fitment and material consistency, eliminating the guesswork associated with aftermarket alternatives. This set screw is typically located in the valve body or clutch pack retention area, where it prevents axial movement of shafts and gears.
Symptoms of Failure
- Transmission oil leaks at the housing joint: A worn or stripped set screw can loosen the seal between the 4661101020 TRANSMISSION HOUSING and its mating surface, allowing ATF to weep out during operation.
- Gear slipping under load: If the 0631.100.167 fails to maintain clamping force, internal components may shift, causing intermittent gear engagement loss during acceleration.
- Unusual metallic rattling from the bell housing: A loose set screw can vibrate against the 4661301093 TUBE or other adjacent parts, producing a distinct noise that worsens with RPM changes.
- Erratic shift timing: When this set screw loses its preload, hydraulic pressure pathways can become misaligned, leading to delayed or harsh shifts.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0631.100.167 |
| OEM Reference | ZF 0631.100.167 |
| Material | Case-hardened alloy steel (30CrMo equivalent) |
| Thread Size | M10 x 1.5 (estimated) |
| Length | 25 mm (estimated) |
| Head Type | Hex socket (Allen) |
| Weight | Approx. 18 g |
| Finish | Zinc-plated with black passivation |
| Torque Specification | 35 Nm (factory spec) |
Compatibility
This set screw is primarily validated for the ZF WG90 and WG94 series transmissions, which are widely used in medium-duty trucks and industrial equipment. Based on its design and thread pattern, the 0631.100.167 is also compatible with the following ZF models: WG180, WG200, WG210, WG220, WG250, WG300, and WG310. It is frequently ordered alongside the 0631306174 CYLINDRICAL PIN for precise alignment during reassembly. Always verify your transmission model number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101020 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4661301046 | HOUSING II | Secondary housing for clutch pack |
| 4661301093 | TUBE | Hydraulic fluid conduit |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for housing |
| 0769123894 | TYPE PLATE | Identification tag for transmission |
| 0750100022 | SCREW PLUG | Seals oil passages |
| 0636302602 | SCREW PLUG | Drain or fill port plug |
| 0634100633 | O-RING | Hydraulic seal |
| 4661301041 | NOZZLE | Lubrication spray nozzle |
| 4661301038 | NOZZLE | Secondary lubrication nozzle |
