Overview
The ZF 2098.340.035 PIN is a precision-machined locating and alignment component engineered for the differential carrier assembly in ZF WG100, WG130, and WG131 heavy-duty transmissions. This OEM genuine pin ensures correct meshing between the crown wheel and pinion gear set by maintaining exact axial positioning within the differential housing. The SKU 2098.340.035 is manufactured to ZF’s original tolerances, preventing unwanted movement that can lead to premature gear wear. It works in concert with the 2098309010: DIFFERENTIAL HOUSING to secure the rotating assembly, and is often replaced alongside the 2098109042: DIFFERENTIAL during a full rebuild.
Symptoms of Failure
- Excessive differential backlash – A worn or sheared 2098.340.035 pin allows the differential gears to shift, creating a noticeable clunk when shifting between drive and reverse.
- Oil contamination with metallic debris – As the pin degrades, steel particles enter the gear oil, often visible during drain intervals as silver or dark sludge.
- Intermittent gear slipping under load – The pin’s failure to hold the 2098309011: CROWN WHEEL in proper alignment causes momentary loss of torque transfer during acceleration.
- Vibration from the differential area – Unusual low-frequency hum or vibration at highway speeds indicates the pin is no longer maintaining concentricity between the 2099209001: DIFFERENTIAL and the housing.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 2098.340.035 |
| Material | Case-hardened alloy steel (16MnCr5 equivalent) |
| Overall Length | 42.0 mm |
| Outer Diameter | 12.0 mm |
| Hardness | 58-62 HRC |
| Weight | 0.038 kg |
| OEM Reference | ZF 2098.340.035 |
| Surface Finish | Ground & phosphate coated |
Compatibility
This pin is specifically designed for the following ZF transmission families: WG100, WG130, and WG131. It is a direct fit for all sub-variants within these series, including WG100-2, WG130-3, and WG131-4 models. The 2098.340.035 pin is not interchangeable with pins from the WG180 or WG200 series due to differences in housing bore diameter. Always verify your transmission’s serial plate before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2098109042 | DIFFERENTIAL | Distributes torque to axle shafts |
| 2098309011 | CROWN WHEEL | Drives the differential assembly |
| 2099209001 | DIFFERENTIAL | Complete differential carrier unit |
| 2098309010 | DIFFERENTIAL HOUSING | Encloses differential gears |
| 2098309009 | DIFFERENTIAL HOUSING | Alternate housing variant |
| 2098309031 | AXLE BEVEL GEAR | Transfers power to axle |
| 2098309030 | AXLE BEVEL GEAR | Matching bevel gear set |
| 2098309032 | DIFFERENTIAL BEVEL GEAR | Internal gear for differential action |
| 12883200682 | THRUST WASHER | Reduces axial friction |
| 0635332059 | BALL BEARING | Supports rotating shafts |
