ZF 2093.070.003 TRA 20 | OEM Genuine Part

Overview

The ZF 2093.070.003 TRA 20 is a critical OEM genuine differential assembly component engineered for heavy-duty construction machinery transmissions. This part functions as the primary torque distribution unit within the final drive assembly, ensuring power is evenly split between axle shafts while allowing for necessary speed differentiation during turns. As an integral element of the ZF drivetrain system, the SKU 2093.070.003 works in concert with the 2093109021 DIFFERENTIAL to maintain optimal traction under extreme loads. Its precision-machined housing interfaces directly with the 2093309073 DIFF.HOUSING to create a sealed environment for gear lubrication, making it indispensable for maintaining transmission longevity in excavators, loaders, and graders.

Symptoms of Failure

• Oil leaks near axle seals: When the 2093.070.003 unit wears, degraded sealing surfaces allow transmission fluid to escape, often visible as drips beneath the vehicle after operation. This is a common search query for “ZF transmission oil leak repair.”
• Grinding noise during turns: Worn internal gears cause audible metal-on-metal contact, particularly when maneuvering at low speeds. Operators searching for “differential grinding noise construction machinery” will find this symptom relevant.
• Uneven tire wear or wheel hop: A failing TRA 20 disrupts torque distribution, leading to premature tire degradation on one side. This aligns with long-tail searches like “uneven tire wear ZF WG transmission.”
• Vibration under load: Excessive play in the differential assembly creates driveline shudder when accelerating, a symptom often linked to “ZF transmission vibration troubleshooting.”

Technical Specifications

Compatibility

This genuine ZF 2093.070.003 TRA 20 is designed for use in the following ZF transmission models commonly found in construction machinery: WG180, WG200, WG210, and WG250 series. It is also compatible with select ZF Ergopower and ZF Ecomix drivelines used in concrete mixers and dump trucks. For proper installation, this part must be paired with the 0750117075 TAPER ROLLER BEARING to support axial loads, and the 2093209096 DIFFERENTIAL for complete gear set alignment. Always verify your transmission serial number before ordering.

Related Components

Frequently Asked Questions

Q: Can the ZF 2093.070.003 be rebuilt, or must it be replaced?
A: While some internal components like bearings and washers can be serviced, the TRA 20 housing and gear set are precision-matched at the factory. ZF recommends full replacement with OEM part 2093.070.003 to avoid premature failure from mismatched wear patterns.

Q: What is the typical lifespan of this differential in a wheel loader?
A: Under normal operating conditions with proper lubrication, the 2093.070.003 typically lasts 8,000 to 12,000 hours. Harsh environments with heavy dust or shock loading can reduce this interval significantly.

Q: Does this part require special tools for installation?
A: Yes, installation requires a bearing puller set and a torque wrench capable of 120 Nm. The 0750117075 TAPER ROLLER BEARING must be pressed into the housing using a hydraulic press to avoid damaging the raceways.