Overview
The ZF 2095.103.016 COUNTERSHAFT is a critical torque-transfer component engineered for the WG100, WG130, and WG131 series transmissions. This OEM genuine part serves as the primary intermediary shaft that distributes rotational force from the input to the output gearing cluster. Manufactured to ZF’s exacting metallurgical standards, the countershaft (SKU: 2095.103.016) ensures precise gear meshing and minimal power loss under heavy load conditions. It sits centrally within the transmission housing, supported by precision bearings and interacting directly with the 5838109021: DIFFERENTIAL assembly to manage final drive ratios.
Symptoms of Failure
- Persistent gear whine or grinding noise during acceleration: Worn splines or surface pitting on the countershaft cause irregular tooth contact, producing a distinct high-pitched noise that intensifies under load.
- Intermittent gear slipping in higher ranges: When the countershaft’s bearing journals degrade, the shaft can shift axially, causing the 0750117075: TAPER ROLLER BEARING to lose preload and allowing gear disengagement.
- Metallic debris in transmission fluid: Flaking or spalling on the countershaft’s hardened surfaces introduces ferrous particles into the oil, often visible during drain intervals.
- Vibration through the driveline at cruising speeds: A bent or fatigued countershaft creates rotational imbalance, felt as a rhythmic shudder in the chassis.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 2095.103.016 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Overall Length | 385 mm (estimated) |
| Journal Diameter | 45 mm (estimated) |
| Weight | 4.2 kg (estimated) |
| Surface Hardness | 58-62 HRC |
| OEM Reference | ZF 2095.103.016 |
| Thread Pitch | M24 x 1.5 (input end) |
Compatibility
This countershaft is specifically designed for ZF’s WG-series modular transmissions. Primary compatibility includes the WG100, WG130, and WG131 models, which share the same countershaft geometry and spline count. It is also mechanically interchangeable with certain variants of the WG180 and WG200 series when used with the 2095209019: DIFFERENTIAL assembly. Always verify the shaft’s keyway orientation and bearing seat dimensions against your transmission’s serial number before installation. The 0631329086: SPRING PIN is required to lock the countershaft gear in position during reassembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109021 | DIFFERENTIAL | Distributes torque to output shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports countershaft radial and axial loads |
| 2095209019 | DIFFERENTIAL | Alternate differential assembly for WG131 |
| 0631329086 | SPRING PIN | Secures gear to countershaft |
| 5838300817 | THRUST WASHER | Controls axial play on countershaft |
| 5838300682 | DIFFERENTIAL AXLE | Carries differential side gears |
| 5838300811 | THRUST WASHER | Spacer for differential assembly |
| 5841302064 | THRUST WASHER | Bearing preload adjustment |
| 5838300812 | SEALING RING | Prevents oil leakage at shaft exit |
| 5838300137 | OUTER CLUTCH DISK | Transfers torque in clutch packs |
