ZF 6073.023.095 TCU WG 94 EC3A for WG94 | OEM Genuine Part

Overview

The ZF 6073.023.095 TCU WG 94 EC3A is a critical electronic control unit (Transmission Control Unit) engineered specifically for the WG 94 series. This OEM genuine part governs shift timing, clutch pressure modulation, and torque converter lock-up within the transmission assembly. As the brain of the hydraulic system, it interprets sensor inputs to ensure precise gear engagement under varying load conditions. The SKU 6073.023.095 is mounted directly onto the valve body housing, where it interfaces with solenoids and harness connections. For optimal structural integrity, this TCU is often installed alongside the 4661101042: TRANSMISSION HOUSING, which provides the sealed environment necessary for consistent electronic performance.

Symptoms of Failure

• Erratic shifting or delayed engagement: When the TCU loses calibration, operators may experience harsh upshifts or a noticeable lag when moving from neutral to drive, especially under heavy load.
• Torque converter shudder at highway speeds: A worn TCU fails to modulate lock-up pressure, causing a rhythmic vibration during steady-state cruising—a common complaint in WG94 applications.
• Intermittent limp mode activation: The transmission may default to a single gear (usually 3rd) without warning, often triggered by internal voltage faults within the 6073.023.095 unit.
• No communication with diagnostic tools: A complete failure of the TCU can prevent scan tools from reading transmission data, mimicking a dead controller module.

Technical Specifications

Compatibility

This TCU is primarily designed for the ZF WG 94 series transmissions found in heavy-duty trucks, buses, and off-highway equipment. Based on its architecture, the 6073.023.095 is also compatible with the WG180 and WG200 models when used with the appropriate wiring harness. The unit interfaces directly with the 4661301108: HOUSING II to protect internal circuit boards from vibration and thermal stress. For mechanical retention, the 0631306174: CYLINDRICAL PIN ensures precise alignment during assembly. Additionally, the 0769123894: TYPE PLATE is affixed to the TCU cover for quick identification during service intervals.

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