ZF 6073.023.084 TCU WG 94 EC3A for WG94 | OEM Genuine Part

Overview

The ZF 6073.023.084 TCU WG 94 EC3A is a genuine OEM Transmission Control Unit specifically engineered for the WG 94 series. This electronic module governs shift timing, clutch pressure modulation, and torque converter lock-up within the transmission housing. As the brain of the gearbox, the TCU receives sensor inputs to optimize gear selection under varying load conditions. The SKU 6073.023.084 ensures a direct replacement for the original factory unit, maintaining precise communication with the vehicle’s CAN bus system. It is typically mounted directly onto the valve body assembly, often adjacent to the 4661101046: HOUSING which protects the internal solenoids from contamination.

Symptoms of Failure

• Erratic shifting or gear hunting: When the TCU fails, the transmission may randomly upshift or downshift without driver input, especially under light throttle.
• Delayed engagement from Neutral to Drive: A worn TCU can cause a 2-3 second lag before the transmission engages, often accompanied by a harsh clunk.
• Loss of torque converter lock-up: The vehicle may fail to lock the torque converter, resulting in elevated RPMs at highway speeds and reduced fuel economy.
• Intermittent limp mode activation: The system may trigger a fault code and lock the transmission in a single gear (typically 3rd or 4th) to prevent damage.

Technical Specifications

Compatibility

This TCU is designed primarily for the ZF WG 94 series transmissions. Based on the EC3A variant designation, it is also compatible with the WG 180 and WG 200 models when used in off-highway applications such as forklifts and loaders. The unit interfaces directly with the 4661301125: HOUSING II which encloses the shift valve spools. Additionally, the 0631306174: CYLINDRICAL PIN is required to align the TCU mounting bracket during installation. Always verify the 0769123894: TYPE PLATE on your existing unit to confirm software revision compatibility before ordering.

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