ZF 2099.070.011 TRA 20 | OEM Genuine Part

Overview

The ZF 2099.070.011 TRA 20 is a critical OEM genuine internal gear and shaft assembly designed for the power-dividing section of heavy-duty ZF construction machinery transmissions. This component, identified by SKU 2099.070.011, functions as the primary torque transfer interface between the input shaft and the differential carrier. It sits directly within the transmission housing, meshing with the ring gear to distribute engine power to the axle shafts. As a genuine ZF part, it ensures precise gear lash and load distribution, which is essential for maintaining drivetrain efficiency in wheel loaders and graders.

Symptoms of Failure

• Whining or howling noise during acceleration: A high-pitched metallic sound from the transmission center section often indicates worn gear teeth on the 2099.070.011 assembly, especially under load.
• Intermittent gear slipping under heavy load: If the transmission loses drive momentarily when pushing material, the TRA 20 gear may have stripped teeth or a damaged spline connection.
• Metal particles in transmission oil filter: Flakes or silver debris in the hydraulic fluid are a direct sign of gear surface fatigue on this part, requiring immediate inspection.
• Vibration in the driveline at low speeds: A rhythmic shudder felt through the chassis during tight maneuvers suggests uneven wear on the 2099.070.011 gear set.

Technical Specifications

Compatibility

This ZF 2099.070.011 TRA 20 gear assembly is engineered for use in the ZF WG180, WG200, and WG211 series powershift transmissions commonly found in construction machinery. It is also compatible with certain iterations of the ZF 4WG-200 and 6WG-200 models used in telescopic handlers and compact loaders. For exact fitment, verify the transmission serial number against the ZF parts catalog, as internal ratios vary by application.

During installation, this gear directly interfaces with the 2099109013 DIFFERENTIAL and the 2093209094 DIFFERENTIAL unit. Proper alignment also requires the 0750117075 TAPER ROLLER BEARING to support axial loads, while the 2093309078 DIFF.HOUSING provides the structural enclosure for the entire assembly.

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