Overview
The ZF 6073.024.067 TCU BP EC4A is a critical electronic control unit specifically designed for the BP230 series of powershift transmissions. This OEM genuine part acts as the brain of the transmission, managing shift timing, clutch pressure, and torque converter lock-up to ensure smooth power delivery under heavy loads. Located within the main control housing, this TCU interprets sensor data and actuates solenoids to optimize gear selection. The SKU 6073.024.067 is the exact factory-spec replacement for maintaining original performance in ZF BP230 drivelines.
Symptoms of Failure
- Erratic shifting or gear hunting: A failing TCU often causes the transmission to shift harshly or hunt for gears at highway speeds, especially under load.
- Delayed engagement or no forward/reverse: When the TCU loses communication with internal sensors, you may experience a significant delay when shifting from neutral to drive or reverse.
- Transmission stuck in limp mode: A common failure symptom is the transmission locking into a single gear (usually 2nd or 3rd) to protect internal components, accompanied by a check-engine light.
- Intermittent loss of power or surging: Worn internal circuitry can cause the torque converter clutch to engage unpredictably, leading to surging or sudden loss of power during acceleration.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 6073.024.067 |
| Product Type | Transmission Control Unit (TCU) BP EC4A |
| Material | Aluminum housing with sealed electronic board |
| Weight | 1.2 kg (2.65 lbs) |
| Dimensions (L x W x H) | 210 mm x 140 mm x 45 mm |
| OEM Reference | ZF 6073.024.067 |
| Operating Voltage | 12V / 24V DC |
| Connector Type | 40-pin AMP / Deutsch |
Compatibility
This TCU is engineered for the ZF BP230 series, but its electronic architecture also supports select models in the WG180, WG200, and WG210 families when used with the correct harness. It is a direct fit for BP230, BP233, and BP235 transmissions found in off-highway trucks, cranes, and agricultural machinery. Always verify your transmission serial number before installation.
Related Components
When replacing the TCU, it is recommended to inspect the surrounding assembly. The TRANSMISSION HOUSING provides the structural foundation, while the HOUS.FRONT SECT and HOUSING REAR PART enclose the valve body and clutch packs. The CASE protects the internal gear train from contamination.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4681101002 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4681201007 | HOUS.FRONT SECT | Front section housing the pump and torque converter |
| 4681201008 | HOUSING REAR PART | Rear section enclosing output shaft and clutches |
| 4681298001 | CASE | Protective cover for internal components |
| 0631306074 | CYLINDRICAL PIN | Alignment pin for housing assembly |
| 0636100801 | CAP SCREW | Fastener for securing housing sections |
| 4681301015 | FIXING PLATE | Mounting plate for valve body retention |
| 4681301016 | SCREEN SHEET | Fine mesh filter for hydraulic fluid |
| 4681301017 | SCREEN SHEET | Coarse mesh pre-filter for oil sump |
| 0636100803 | CAP SCREW | High-tensile bolt for clutch pack retention |
Frequently Asked Questions
Q: Can the ZF 6073.024.067 TCU be reprogrammed for different applications?
A: Yes, this TCU can be reflashed with updated firmware using ZF diagnostic tools, but it is pre-calibrated for BP230 series parameters. Reprogramming should only be performed by a certified ZF service center.
Q: What is the typical lifespan of this TCU in heavy-duty use?
A: Under normal operating conditions, the 6073.024.067 TCU lasts between 8,000 and 12,000 hours. Exposure to excessive heat or vibration can reduce its service life.
Q: Do I need to replace the wiring harness when installing this TCU?
A: Not necessarily, but inspect the harness for corrosion or damaged pins. The CYLINDRICAL PIN and CAP SCREW should be replaced if they show wear to ensure a secure connection.
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