Overview
The ZF 2094.103.010 COUNTERSHAFT (SKU: 2094.103.010) is a critical internal component within the gear train of ZF WG100, WG130, and WG131 transmissions. This OEM genuine part serves as the primary torque-transferring shaft that meshes with multiple gear sets to facilitate smooth ratio changes under load. Positioned between the input shaft and the output shaft assembly, the countershaft ensures correct rotational speed and direction for both forward and reverse operations. It is precision-machined from high-strength alloy steel to withstand continuous torsional stress in heavy-duty industrial applications.
Symptoms of Failure
- Grinding noise during gear engagement: Worn splines or bearing journals on the countershaft cause harsh metallic sounds when shifting, often misdiagnosed as clutch issues.
- Vibration at specific RPM ranges: A bent or fatigued countershaft creates harmonic vibrations that resonate through the driveline, particularly between 1200-1800 RPM.
- Oil contamination with metallic debris: Flaking or pitting on the countershaft surface introduces fine steel particles into the transmission fluid, visible during drain intervals.
- Intermittent power loss under load: Excessive axial play from a worn countershaft allows gear teeth to skip, causing sudden torque drops during uphill or heavy-load operation.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 2094.103.010 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Overall Length | 385 mm (estimated) |
| Journal Diameter | 45 mm (estimated) |
| Weight | 4.2 kg (estimated) |
| OEM Reference | ZF 2094.103.010 |
| Surface Hardness | 58-62 HRC |
Compatibility
This countershaft is engineered specifically for ZF WG100, WG130, and WG131 series transmissions. It is also compatible with select variants of the WG180 and WG200 models that share the same gear center distance and spline configuration. Always verify your transmission model number and serial range before ordering. The part integrates directly with the 2094101012: TRANSMISSION HOUSING and the 2094301036: HOUSING to maintain proper shaft alignment. Additionally, the 2094298057: HOUSING and 2094301071: COVER are installed adjacent to this countershaft in the same assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2094101012 | TRANSMISSION HOUSING | Encloses and supports the countershaft assembly |
| 2094301036 | HOUSING | Provides bearing seat for countershaft end |
| 2094298057 | HOUSING | Rear housing section aligning output gears |
| 2094301071 | COVER | Seals the countershaft access port |
| 0750111371 | SHAFT SEAL | Prevents oil leakage at countershaft exit |
| 0634303085 | O-RING | Seals housing joint against fluid loss |
| 2094301030 | GASKET | Provides leak-proof mating surface |
| 0631306670 | CYLINDRICAL PIN | Locates countershaft in correct orientation |
| 0636011356 | HEXAGON SCREW | Secures housing components to countershaft |
| 4475280060 | SCREW PLUG | Closes oil gallery access points |
