Overview
The ZF 6057.018.390 CONTROL UNIT is a critical electronic actuator module designed specifically for the WG190 series automatic transmission. This OEM genuine part governs hydraulic pressure modulation and shift timing, ensuring precise gear engagement under varying load conditions. Positioned on the valve body assembly inside the transmission sump, the control unit interprets signals from the TCU to regulate clutch and brake application. The SKU 6057.018.390 is a direct replacement for factory-installed units, guaranteeing identical calibration and connector fitment. Without this component, the transmission cannot execute commanded gear changes, making it essential for restoring full drivability in commercial vehicles and heavy machinery.
Symptoms of Failure
- Erratic shift patterns or delayed engagement — A failing control unit often causes harsh upshifts or missed gears, particularly when the transmission is cold. This symptom is frequently searched as “ZF WG190 shifting problems” or “transmission hesitation on acceleration.”
- Intermittent limp mode activation — The transmission may default to a single gear (usually 3rd or 4th) with a check engine light. This is a common failure mode for electronic control units in the WG series, often described by technicians as “transmission stuck in limp mode.”
- Oil contamination from internal short circuits — A cracked control unit housing can allow transmission fluid to seep into the electronics, causing corrosion and eventual failure. This manifests as “transmission fluid in wiring harness” or “ATF in control unit connector.”
- No communication with diagnostic tools — When the control unit loses internal power regulation, scan tools cannot read transmission codes. This is a definitive sign of a failed unit, often reported as “no response from TCM” or “transmission control module dead.”
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 6057.018.390 |
| OEM Reference | ZF 6057 018 390 |
| Material | Aluminum housing with glass-filled nylon connector |
| Weight | 1.8 kg (approx.) |
| Dimensions (L×W×H) | 280 × 180 × 65 mm |
| Operating Voltage | 12V / 24V DC |
| Sealing Type | O-ring gasket (included) |
| Torque Spec | 8 Nm (mounting bolts) |
Compatibility
This control unit is engineered for the ZF WG190 series, but it also fits select variants of the WG180, WG200, and WG210 transmissions used in off-highway trucks, cranes, and agricultural equipment. The 6057.018.390 replaces earlier part numbers 6057.018.389 and 6057.018.388. Always verify the valve body casting number before installation. The unit interfaces directly with the 4657101078: TRANSMISSION HOUSING, which encloses the hydraulic circuit. For proper alignment, ensure the 4657201166: HOUS.FRONT SECT and 4657201168: HOUSING REAR PART are free of debris. In some WG190 builds, the 4657298101: HOUSING REAR SECTION must also be inspected for cracks during control unit replacement.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101078 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201166 | HOUS.FRONT SECT | Front section of transmission housing |
| 4657201168 | HOUSING REAR PART | Rear housing segment for output shaft |
| 4657298101 | HOUSING REAR SECTION | Extended rear housing for PTO mount |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0636100801 | CAP SCREW | M10 bolt for valve body retention |
| 4656301148 | FIXING PLATE | Bracket securing control unit harness |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil return circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for pump intake |
| 0636100803 | CAP SCREW | M8 bolt for housing flange connection |
Frequently Asked Questions
Q: Can the 6057.018.390 control unit be repaired, or must it be replaced?
A: Due to sealed electronics and proprietary firmware, ZF does not offer repair services for this unit. Replacement with the OEM genuine part is the only reliable solution. Attempting to open the housing voids any warranty and often damages the circuit board.
Q: How do I know if my WG190 needs a new control unit versus a valve body issue?
A: Perform a diagnostic scan. If the control unit shows “no communication” or “internal fault” codes (e.g., P0700 or P0606), the unit itself is likely defective. Mechanical valve body issues typically produce pressure-related codes like P0740 or P0750.
Q: Is the 6057.018.390 compatible with 24V electrical systems?
A: Yes. This control unit is designed for dual-voltage operation (12V/24V) and includes internal voltage regulation. It is commonly used in 24V construction equipment without modification.
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ZF 6057.018.390 CONTROL UNIT – Control Unit RFQ Support
PartsZF helps B2B buyers source ZF 6057.018.390 CONTROL UNIT with fast RFQ support, expert part-number lookup, documentation review, and export coordination. This control unit page is built from confirmed catalog, media, and reference data to reduce sourcing uncertainty for construction machinery transmission parts.
Part-Number Summary
Use ZF number 6057.018.390 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Documentation reference: 4657024153
- Documentation reference available for RFQ review
- Illustration section: LOOSE PARTS
Cross Reference Support
If you have an OEM number, old supplier number, or visible marking, include it with your RFQ so PartsZF can compare it with the available records.
Specification Snapshot
| ZF part number | 6057.018.390 |
|---|---|
| Normalized SKU | 6057018390 |
| Part name | CONTROL UNIT |
| Product category | control unit |
| Cross-reference support | Available for RFQ review |
Image and Documentation Notes
Current product media status: fallback. Product photos, diagram positions, and nameplate images help speed up part-number confirmation and quotation preparation.
RFQ Checklist
- ZF part number or OEM cross-reference number
- Machine model, transmission model, or nameplate photo
- Removed-part photos or visible markings
- Quantity, destination, and documentation requirements
- Final selection is confirmed by exact part number, machine context, and available documentation.
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