Overview
The ZF 2095.303.030 COUNTERSHAFT is a critical rotating component within the WG100, WG130, and WG131 transmission series. This OEM genuine part serves as the primary torque-transfer interface between the input shaft and the output gearing cluster, ensuring precise gear alignment and smooth power delivery under heavy load. The countershaft (SKU: 2095.303.030) is precision-machined to maintain concentricity and reduce vibration, directly supporting the 5838109007: DIFFERENTIAL assembly by providing a stable rotational base. Without this shaft, the transmission cannot achieve proper gear mesh, leading to drivetrain inefficiency.
Symptoms of Failure
- Whining or grinding noise during acceleration: A worn countershaft bearing journal causes metal-on-metal contact, producing a distinct whine that increases with RPM. This is a common long-tail search query for “ZF transmission whining noise fix.”
- Intermittent gear slipping under load: When the countershaft splines wear, the mating gears lose positive engagement, causing the transmission to slip out of gear during uphill climbs or heavy towing.
- Metal debris in transmission fluid: Flaking or pitting on the countershaft surface contaminates the oil, often visible as glitter in the fluid. This symptom is frequently searched as “metal shavings in ZF transmission fluid.”
- Excessive axial play or vibration: A bent or worn countershaft creates lateral movement, felt as a rhythmic vibration through the gearshift lever or chassis at highway speeds.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 2095.303.030 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Overall Length | 385 mm (estimated) |
| Journal Diameter | 45 mm (input side) |
| Weight | 4.2 kg (9.3 lbs) |
| OEM Reference | ZF 2095.303.030 |
| Hardness | 58-62 HRC (surface) |
Compatibility
This countershaft is engineered for the ZF WG100, WG130, and WG131 series transmissions, commonly found in medium-duty trucks, agricultural tractors, and construction loaders. It is also compatible with the WG180 and WG200 variants when used with the appropriate 0750117075: TAPER ROLLER BEARING and 2095209019: DIFFERENTIAL assembly. For proper installation, ensure the 0631329086: SPRING PIN is replaced simultaneously to secure the shaft in its housing.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109007 | DIFFERENTIAL | Distributes torque to axles |
| 0750117075 | TAPER ROLLER BEARING | Supports countershaft radial loads |
| 2095209019 | DIFFERENTIAL | Secondary torque distribution unit |
| 0631329086 | SPRING PIN | Locks shaft to housing |
| 5838300817 | THRUST WASHER | Controls axial clearance |
| 5838300682 | DIFFERENTIAL AXLE | Connects differential to wheel hubs |
| 5838300811 | THRUST WASHER | Secondary axial load management |
| 5841302064 | THRUST WASHER | High-load axial bearing surface |
| 5838300137 | OUTER CLUTCH DISK | Friction surface for gear engagement |
| 5838300138 | INNER CLUTCH DISK | Steel core for clutch pack |
