ZF 2099.056.008 TRA 11 | OEM Genuine Part

Overview

The ZF 2099.056.008 TRA 11 is an OEM genuine differential component engineered for heavy-duty construction machinery transmissions. This precision-machined part sits within the final drive assembly of ZF powershift transmissions, where it distributes torque from the crown wheel to the axle shafts. As a critical load-bearing element, the SKU 2099.056.008 ensures smooth power transfer under extreme operating conditions, reducing drivetrain stress in excavators, wheel loaders, and graders. When paired with a 2098309008 CROWN WHEEL, it forms the core of the differential unit, enabling proper wheel speed differentiation during turns.

Symptoms of Failure

• Oil leaks around the differential housing: Worn seals or cracks in the 2099.056.008 unit allow transmission fluid to escape, often visible as drips near the axle connection point.
• Gear slipping during load shifts: Internal gear wear causes intermittent loss of torque transfer, particularly when the machine is under heavy load or climbing grades.
• Grinding noise from the final drive: Damaged teeth or bearing surfaces produce a metallic grinding sound that intensifies with speed, indicating imminent failure of the differential assembly.
• Uneven tire wear or vibration: A failing 2099.056.008 disrupts wheel speed synchronization, leading to accelerated tire wear on one side and chassis vibration at low speeds.

Technical Specifications

Compatibility

This genuine ZF part is designed for use in WG180, WG200, and WG250 transmission series commonly found in construction machinery. It also fits select models of the ZF 4WG-200 and 6WG-200 powershift transmissions. For proper installation, ensure the 2099109038 DIFFERENTIAL and 2098209016 DIFFERENTIAL are inspected simultaneously, as wear in one component often accelerates degradation in the other. The 2095309059 DIFF.HOUSING must be free of cracks to maintain proper alignment.

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