Overview
The ZF 0631.100.181 SPRING PIN is a precision-engineered OEM genuine part designed for the WG100, WG130, and WG131 transmission series. This small but critical fastener secures internal shift components and alignment sleeves within the transmission housing, preventing axial movement during high-torque operation. As a genuine ZF component, SKU 0631.100.181 ensures exact fitment and metallurgical consistency, reducing the risk of premature wear in the shift rail assembly. It is commonly replaced alongside the 2093109002: DIFFERENTIAL and the 0750117075: TAPER ROLLER BEARING during a full overhaul.
Symptoms of Failure
- Erratic gear engagement or gear slipping — A worn spring pin can allow shift forks to drift, causing intermittent gear disengagement under load.
- Metallic rattling from the transmission housing — Loose spring pins create audible vibration as internal components lose their indexed position.
- Oil contamination with metallic debris — Fractured spring pin fragments circulate through the lubrication system, often damaging the 2093209095: DIFFERENTIAL and 2093309071: DIFF.HOUSING.
- Hard shifting or stuck selector rails — A deformed spring pin jams the shift mechanism, requiring excessive force to change gears.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 0631.100.181 |
| Material | Hardened spring steel (DIN 17223) |
| Outside Diameter | 6.0 mm |
| Length | 30.0 mm |
| Wall Thickness | 1.0 mm |
| Weight | 4.2 g |
| OEM Reference | ZF 0631.100.181 |
| Heat Treatment | Through-hardened, tempered |
Compatibility
This spring pin is factory-specified for ZF WG100, WG130, and WG131 transmissions. It also fits select WG180 and WG200 variants where the shift rail diameter matches 6.0 mm. Always verify the pin length against your existing part before installation. When servicing these transmissions, it is standard practice to inspect the 2093109002: DIFFERENTIAL and 0750117075: TAPER ROLLER BEARING for wear simultaneously.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0631100223 | SPRING PIN | Alternate length spring pin for WG series shift rails |
| 0730300820 | THRUST WASHER | Axial load bearing surface for differential assembly |
| 4482360002 | AXLE BEVEL GEAR | Final drive gear for torque transfer to axles |
| 2097309085 | DIFFERENTIAL AXLE | Cross shaft supporting differential pinion gears |
| 5838300811 | THRUST WASHER | Low-friction washer for differential side gears |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Mating bevel gear for differential rotation |
Frequently Asked Questions
Q: Can I reuse the old spring pin during a rebuild?
No. Spring pins are single-use components due to work hardening. Always install a new ZF 0631.100.181 to maintain clamping force.
Q: Does this pin fit the ZF WG180 transmission?
It fits WG180 models with a 6.0 mm shift rail bore. Measure your existing pin length; if it matches 30.0 mm, this part is compatible.
Q: What tools are needed for installation?
A standard pin punch and hammer are sufficient. Ensure the pin is driven flush with the housing surface to avoid interference with the shift fork.
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Phone: +86 158 2286 3467 |
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