Overview
The ZF 2095.303.017 COUNTERSHAFT is a critical rotating component within the ZF WG100, WG130, and WG131 transmission families. As an OEM genuine part (SKU: 2095.303.017), it serves as the primary torque-transfer interface between the input shaft and the output gearing cluster. This countershaft supports multiple gear ratios and directly influences shift quality and power delivery. When installed alongside the 5838109007 DIFFERENTIAL, it ensures synchronized load distribution across the driveline. Precision-ground splines and hardened journals on this shaft maintain alignment with the 0750117075 TAPER ROLLER BEARING for minimal rotational friction.
Symptoms of Failure
- Gear whine under load: A high-pitched noise during acceleration indicates worn countershaft teeth or bearing journal scoring.
- Hard shifting or gear clash: When the countershaft loses dimensional stability, synchronizers cannot engage cleanly, causing grinding.
- Metallic debris in transmission fluid: Flaking from the countershaft surface contaminates the oil, often accompanied by a burnt smell.
- Vibration at highway speeds: A bent or unbalanced countershaft creates rhythmic shaking that worsens with RPM.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 2095.303.017 |
| Overall Length | 385 mm (estimated) |
| Journal Diameter | 45 mm (estimated) |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Weight | 4.2 kg (estimated) |
| OEM Reference | ZF 2095.303.017 |
| Heat Treatment | Carburized & tempered to HRC 58-62 |
Compatibility
This countershaft is engineered specifically for ZF WG-series transmissions. Verified compatible models include WG100, WG130, and WG131. It also fits select variants of the WG180 and WG200 when used with the correct 2095209019 DIFFERENTIAL assembly. For secure retention, always pair this shaft with a new 0631329086 SPRING PIN during installation. Do not use in WG150 or WG250 series without verifying bearing bore dimensions.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109007 | DIFFERENTIAL | Distributes torque between output shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports countershaft radial/axial loads |
| 2095209019 | DIFFERENTIAL | Alternate differential for WG130 variants |
| 0631329086 | SPRING PIN | Locks countershaft gear to shaft |
| 5838300817 | THRUST WASHER | Controls axial clearance on countershaft |
| 5838300682 | DIFFERENTIAL AXLE | Carries differential side gears |
| 5838300811 | THRUST WASHER | Secondary axial thrust surface |
| 5841302064 | THRUST WASHER | High-load thrust washer for output side |
| 5838300137 | OUTER CLUTCH DISK | Friction surface for clutch packs |
| 5838300138 | INNER CLUTCH DISK | Steel separator for clutch engagement |
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