ZF 6073.023.086 TCU WG 94 EC3A for WG94 | OEM Genuine Part

Overview

The ZF 6073.023.086 TCU WG 94 EC3A is a critical electronic control unit designed specifically for the WG 94 series transmission. This OEM genuine part governs shift timing, clutch modulation, and torque converter lock-up within the transmission control module. As the brain of the gearbox, it processes sensor inputs to ensure smooth gear transitions and optimal fuel efficiency. The SKU 6073.023.086 is a direct replacement unit that interfaces with the main valve body assembly, which is housed within the 4661101046: HOUSING and the secondary 4661301125: HOUSING II.

Symptoms of Failure

• Erratic shifting or harsh engagement: When the TCU fails, the transmission may slam into gear or hesitate between ratios, often accompanied by a delayed response when accelerating.
• Torque converter shudder: A worn TCU can cause the lock-up clutch to engage improperly, leading to a noticeable vibration at highway speeds, especially under light load.
• Limp mode activation: The system may default to a single gear (typically 3rd or 4th) to protect the transmission, with the check engine light illuminating on the dashboard.
• Intermittent loss of communication: Faulty internal circuitry can cause the transmission to drop into neutral unexpectedly or fail to respond to gear selector inputs.

Technical Specifications

Compatibility

This TCU is engineered for the ZF WG94 transmission series, which includes the WG94, WG94-EC3A, and WG94-EC3B variants. While primarily designed for the WG94, it shares electronic architecture with the WG180 and WG200 series when used in off-highway and industrial applications. The unit mounts directly onto the valve body and is secured with a 0631306174: CYLINDRICAL PIN for alignment. Always verify the 0769123894: TYPE PLATE on your existing unit to confirm compatibility before installation.

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