Overview
The ZF 0631.329.075 SPRING PIN is a precision-engineered OEM genuine part designed for the WG100, WG130, and WG131 transmission series. This component serves as a critical alignment and retention pin within the shift mechanism and planetary gear assembly, ensuring that adjacent parts remain securely indexed under high torque and vibration. The SKU 0631.329.075 is manufactured to exact ZF tolerances, preventing axial movement that could lead to gear train misalignment. When installed, this spring pin works in concert with the 5838109007: DIFFERENTIAL to maintain proper load distribution across the output shaft.
Symptoms of Failure
- Intermittent gear slipping under load: A worn or fractured spring pin allows the shift fork to drift, causing partial engagement and sudden power loss during acceleration.
- Metallic rattling from the transmission housing: When the pin loses its spring tension, loose components inside the WG100/WG130/WG131 produce a distinct chatter at idle or low RPM.
- Hard shifting or gear lockout: A deformed pin prevents the selector mechanism from reaching full detent, making it difficult to engage forward or reverse gears.
- Oil contamination with metal debris: As the pin fractures, small steel particles circulate through the lubrication system, often accelerating wear on the 0750117075: TAPER ROLLER BEARING.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0631.329.075 |
| Type | Slotted Spring Pin (DIN 1481) |
| Outer Diameter | 8.0 mm |
| Length | 28.0 mm |
| Material | Spring Steel (C67S, hardened & tempered) |
| Surface Finish | Phosphate coated (anti-corrosion) |
| Weight | 6.2 g |
| OEM Reference | ZF 0631.329.075 |
| Shear Strength | ≥ 1,200 N |
Compatibility
This spring pin is directly compatible with ZF WG100, WG130, and WG131 series transmissions used in medium-duty trucks and industrial machinery. It also fits select variants of the WG180 and WG200 when used in the shift rail assembly. For differential-side applications, the 2095209019: DIFFERENTIAL and the 0631329086: SPRING PIN are often replaced simultaneously during a full overhaul. Always verify your transmission model code before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109007 | DIFFERENTIAL | Distributes torque between drive wheels |
| 0750117075 | TAPER ROLLER BEARING | Supports axial and radial loads on shafts |
| 2095209019 | DIFFERENTIAL | Rear output differential assembly |
| 0631329086 | SPRING PIN | Secondary alignment pin for shift mechanism |
| 5838300817 | THRUST WASHER | Controls end-play in planetary gear sets |
| 5838300682 | DIFFERENTIAL AXLE | Cross shaft for differential spider gears |
| 5838300811 | THRUST WASHER | Side gear thrust surface |
| 5841302064 | THRUST WASHER | Output shaft thrust bearing |
| 5838300137 | OUTER CLUTCH DISK | Steel friction plate for clutch packs |
| 5838300138 | INNER CLUTCH DISK | Friction-lined plate for torque transfer |
