Overview
This OEM genuine ZF 2093.070.056 TRA 20 is a critical internal component designed for the differential assembly in heavy-duty construction machinery transmissions. Positioned within the final drive housing, this part ensures precise torque distribution between the wheels during demanding operations like grading, loading, and excavation. The SKU 2093.070.056 is engineered to withstand high axial loads and maintain consistent gear mesh under extreme vibration. When paired with a robust 2093109049 DIFFERENTIAL, it forms the backbone of reliable power transfer in ZF drivetrains.
Symptoms of Failure
- Intermittent gear slipping under load: When the 2093.070.056 wears, you may notice sudden loss of traction during uphill climbs or when pushing heavy material, often accompanied by a grinding noise from the axle housing.
- Oil leaks near the differential housing: A worn TRA 20 can cause seal degradation, leading to visible hydraulic fluid seepage around the 2093309078 DIFF.HOUSING mating surface, especially after prolonged operation.
- Vibration during straight-line travel: Excessive play in this part creates a rhythmic shudder felt through the chassis at speeds above 15 km/h, indicating uneven gear contact within the differential.
- Premature bearing failure: A failing TRA 20 often damages the adjacent 0750117075 TAPER ROLLER BEARING, causing metallic debris in the transmission oil filter.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 2093.070.056 |
| Material | Case-hardened alloy steel (20MnCr5) |
| Weight | 1.85 kg (4.08 lbs) |
| Outer Diameter | 98.5 mm |
| Inner Diameter | 42.0 mm |
| Height | 34.2 mm |
| Surface Hardness | 58-62 HRC |
| OEM Reference | ZF TRA 20 |
Compatibility
This genuine ZF 2093.070.056 is primarily used in the following transmission families: WG180, WG200, and WG250 series. It also fits select models of the Ecolite and PowerShift 2.0 ranges used in wheel loaders, backhoe loaders, and telehandlers. Always verify your transmission serial number before ordering. For complete differential rebuilds, consider the 2093209094 DIFFERENTIAL as a matching companion component.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093109049 | DIFFERENTIAL | Distributes torque between left and right axles |
| 0750117075 | TAPER ROLLER BEARING | Supports axial and radial loads on the differential shaft |
| 2093209094 | DIFFERENTIAL | Secondary differential unit for multi-axle configurations |
| 2093309078 | DIFF.HOUSING | Encloses and protects the differential gear set |
| 0631100223 | SPRING PIN | Secures gear alignment within the differential assembly |
| 0730300820 | THRUST WASHER | Reduces axial friction between rotating gears |
| 4482360002 | AXLE BEVEL GEAR | Transfers power from differential to axle shafts |
| 2097309085 | DIFFERENTIAL AXLE | Connects differential to wheel hubs |
| 5838300811 | THRUST WASHER | Prevents metal-to-metal contact in high-load zones |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Provides final gear reduction within the diff housing |
Frequently Asked Questions
Q: Can I use the ZF 2093.070.056 in a WG180 transmission from a 2015 model?
A: Yes, this part is fully compatible with WG180 transmissions built after 2010. However, we recommend cross-referencing your transmission serial number with our compatibility chart to ensure correct fitment.
Q: What is the typical lifespan of this TRA 20 component under heavy construction use?
A: In normal operating conditions with proper lubrication, the 2093.070.056 can last 4,000-6,000 hours. Signs of wear typically appear earlier if the differential housing or bearings are damaged.
Q: Do I need to replace the thrust washers when installing this part?
A: Absolutely. We always advise replacing the 0730300820 THRUST WASHER and 5838300811 THRUST WASHER simultaneously to prevent uneven wear patterns on the new TRA 20.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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