ZF 2099.070.005 TRA 20 | OEM Genuine Part

Overview

The ZF 2099.070.005 TRA 20 is an OEM genuine internal component engineered for the final drive assembly of heavy-duty construction machinery transmissions. This precision-machined part functions as a critical load-bearing element within the planetary gear set, ensuring torque is transmitted smoothly from the differential to the axle shafts. Designated under SKU 2099.070.005, this component is specifically designed to withstand high axial and radial loads encountered in excavators, wheel loaders, and graders. It integrates directly with the 2099109008 DIFFERENTIAL to maintain gear alignment and reduce internal friction.

Symptoms of Failure

• Intermittent gear slipping under load: When the 2099.070.005 wears, the transmission may momentarily lose torque transfer during heavy digging or climbing, causing a distinct “clunk” or hesitation.
• Metallic grinding noise from the axle housing: Worn surfaces produce a high-pitched whine or grinding sound, especially during turns, indicating contact between the part and the 2093309073 DIFF.HOUSING.
• Contaminated transmission oil with metallic debris: Flakes or silver particles in the fluid are a clear sign that the hardened surface of the TRA 20 has degraded, often accompanied by reduced hydraulic pressure.
• Excessive backlash in the driveline: Operators may notice a delayed response when shifting between forward and reverse, caused by increased clearance between this part and the 2093209096 DIFFERENTIAL.

Technical Specifications

Compatibility

This genuine ZF part is primarily used in the WG180, WG200, and WG210 series transmissions found in construction machinery from manufacturers such as Liebherr, Caterpillar, and Volvo. It is also compatible with the ZF 4WG-200 and 6WG-200 torque converter transmissions. For precise fitment, verify that your transmission housing accommodates the 0750117075 TAPER ROLLER BEARING, which is often replaced concurrently to prevent premature wear.

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