Overview
The ZF 2094.303.036 COUNTERSHAFT is a critical torque-transferring component within the WG100, WG130, and WG131 transmission assemblies. Acting as the secondary shaft that distributes engine power from the input to the output via gear clusters, this OEM genuine part ensures precise gear meshing and load distribution. The SKU 2094.303.036 is engineered to exact ZF tolerances, working in concert with the 2094104412: MAIN SHAFT to maintain driveline stability under heavy industrial loads.
Symptoms of Failure
- Whining or grinding noise during gear engagement: When the countershaft bearing surfaces or gear teeth wear, operators often report a high-pitched whine that intensifies with road speed, indicating imminent failure of the 2094.303.036 unit.
- Vibration through the gearshift lever: A worn countershaft creates radial play, transmitting harsh vibrations directly to the 2094206001: GEARSHIFT SHAFT, making precise gear selection difficult.
- Intermittent gear slipping under load: As the countershaft loses its hardened surface integrity, gear teeth can skip, particularly during uphill hauls or sudden acceleration.
- Metal debris in transmission oil: Flakes or glitter in the fluid often originate from a deteriorating countershaft, requiring immediate replacement of the 2094.303.036 and associated components.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 2094.303.036 |
| Overall Length | 385 mm (estimated) |
| Shaft Diameter | 45 mm (bearing journals) |
| Material | Case-hardened alloy steel (20MnCr5) |
| Weight | 3.2 kg (7.0 lbs) |
| OEM Reference | ZF 2094.303.036 |
| Surface Hardness | 58-62 HRC |
Compatibility
This countershaft is precision-machined for ZF WG-series transmissions, specifically the WG100, WG130, and WG131 models. It also integrates into certain WG180 and WG200 variants where the gear ratio set matches the 2094.303.036 tooth profile. For optimal assembly, pair this part with the 2094304054: MAIN SHAFT and the 2094106010: SHIFT SYSTEM to restore factory-grade shift quality.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2094104412 | MAIN SHAFT | Transfers torque from countershaft to output flange |
| 2094304054 | MAIN SHAFT | Alternate spline configuration for WG131 |
| 2094106010 | SHIFT SYSTEM | Controls fork movement for gear selection |
| 2094206001 | GEARSHIFT SHAFT | Links shift lever to internal selector mechanism |
| 2094306053 | GEARSHIFT SHAFT | Heavy-duty variant for high-torque applications |
| 0630513070 | SNAP RING | Secures countershaft bearing in housing bore |
| 2094306019 | WASHER | Thrust washer for axial clearance adjustment |
| 0732040444 | COMPRESSION SPRING | Provides preload on shift rail detent |
| 0732040728 | COMPRESSION SPRING | Higher rate spring for WG180 shift forks |
| 2093206001 | BUSH | Support bushing for countershaft idler gear |
Frequently Asked Questions
Q: Can the ZF 2094.303.036 countershaft be used in a WG200 transmission?
A: Yes, but only if the gear ratio set matches. The WG200 uses a longer main shaft, so verify compatibility with your specific transmission tag. Always cross-reference the 2094304054: MAIN SHAFT length when retrofitting.
Q: What tools are needed to replace the 2094.303.036 countershaft?
A: A bearing puller, snap ring pliers, and a torque wrench are essential. The 0630513070: SNAP RING must be replaced during installation to prevent axial movement.
Q: How does a worn countershaft affect the shift system?
A: Excessive countershaft play misaligns the gear cluster, causing the 2094106010: SHIFT SYSTEM to bind. This often leads to hard shifting or incomplete engagement, requiring simultaneous inspection of both components.
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