Overview
The ZF 6073.023.082 TCU WG 94 EC3A is a critical electronic control unit specifically engineered for the WG 94 series transmission. This OEM genuine part governs shift timing, clutch pressure modulation, and torque converter lock-up within the transmission housing. Positioned directly on the valve body assembly, the TCU receives input from speed sensors and throttle position to optimize gear selection under load. The SKU 6073.023.082 ensures precise communication between the transmission and the vehicle’s electronic architecture, making it indispensable for maintaining smooth power delivery in heavy-duty applications. When replacing this unit, technicians often inspect the adjacent 4661101046: HOUSING and the 4661301125: HOUSING II for corrosion or damage that could compromise the TCU’s seal.
Symptoms of Failure
- Erratic shift patterns or delayed engagement: A failing TCU may cause the transmission to hunt for gears or hesitate when shifting from neutral to drive, often accompanied by harsh engagement.
- Intermittent limp mode activation: The system may trigger a fault code and force the transmission into a single gear, reducing road speed to protect internal components.
- Torque converter shudder under load: When the TCU loses ability to modulate lock-up pressure, drivers may feel a vibration or shudder during acceleration, especially at highway speeds.
- No communication with diagnostic tools: A completely failed TCU may prevent scan tools from reading transmission data, indicating an internal electrical failure within the 6073.023.082 module.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 6073.023.082 |
| OEM Reference | WG 94 EC3A |
| Material | Die-cast aluminum housing with epoxy-encapsulated PCB |
| Weight | 1.2 kg (2.65 lbs) |
| Dimensions | 210 mm x 140 mm x 45 mm |
| Operating Voltage | 12V / 24V DC |
| Connector Type | 40-pin AMP Junior Timer |
| Sealing | IP67 rated with integrated gasket |
Compatibility
This TCU is designed for the ZF WG 94 series transmission family. Based on its architecture, the 6073.023.082 is compatible with the following models: WG94, WG180, WG200, and WG250 series transmissions used in off-highway trucks, wheel loaders, and agricultural tractors. It is also backward-compatible with certain WG 92 series units when paired with the correct wiring harness. For proper installation, ensure the 0631306174: CYLINDRICAL PIN is aligned correctly to prevent mis-seating, and verify the 0769123894: TYPE PLATE matches the original part revision for firmware compatibility.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101046 | HOUSING | Encloses the TCU and valve body assembly |
| 4661301125 | HOUSING II | Secondary cover for solenoid pack protection |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for precise TCU mounting |
| 0769123894 | TYPE PLATE | Identification tag with part revision data |
| 0750100022 | SCREW PLUG | Seals hydraulic test ports on the valve body |
| 4660201008 | SCREW PLUG | M10 plug for oil gallery access |
| 0636100117 | SCREW PLUG | M8 plug for pressure tap sealing |
| 0501211384 | VALVE | Modulates clutch apply pressure |
| 0732042156 | COMPRESSION SPRING | Returns valve spool to neutral position |
| 0768409154 | SCREW PLUG | Seals accumulator housing bore |
