Overview
The ZF 6057.018.218 CONTROL UNIT is a critical electro-hydraulic interface module designed specifically for the WG 171 Series transmission. This OEM genuine part governs shift timing, clutch pressure modulation, and torque converter lock-up by processing electronic signals from the vehicle’s ECU and converting them into precise hydraulic commands. Positioned directly on the valve body assembly inside the transmission sump, the control unit (SKU: 6057.018.218) ensures seamless gear transitions under heavy-duty cycles. When paired with a robust TRANSMISSION HOUSING, the unit maintains structural integrity against high-pressure surges. The 6057.018.218 is factory-calibrated to ZF’s exact tolerances, making it a direct replacement for failed or degraded units in commercial vehicles and off-highway equipment.
Symptoms of Failure
- Erratic or delayed shifting – The transmission hesitates or slams into gear, especially during cold starts, indicating the control unit’s solenoid valves are sticking or shorting.
- Intermittent loss of drive – The vehicle suddenly drops into neutral or fails to engage forward/reverse gears, often caused by internal circuit board corrosion or connector pin fretting.
- Transmission fluid contamination – Dark, burnt-smelling ATF mixed with metallic debris may appear, as a failing control unit can cause clutch pack overheating and premature wear of the SCREEN SHEET filter element.
- Check engine or transmission warning light – Diagnostic trouble codes (e.g., P0700, P0740) related to solenoid performance or pressure control are logged, often accompanied by reduced power mode.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 6057.018.218 |
| Material | Die-cast aluminum housing with glass-filled nylon connector |
| Weight | 2.85 kg (6.28 lbs) |
| Dimensions (L x W x H) | 280 mm x 180 mm x 95 mm |
| Operating Voltage | 12V / 24V DC (dual-range compatible) |
| Operating Temperature Range | -40°C to +120°C |
| Seal Type | Integrated O-ring groove (uses O-RING 0634313514) |
| Fastener Torque Spec | 12 Nm (use CAP SCREW 0636100803) |
Compatibility
This control unit is engineered for the ZF WG 171 Series, but its valve body footprint and electrical pinout also match the WG 180, WG 200, and WG 211 series transmissions used in mid-range buses, fire trucks, and construction loaders. Always verify the transmission serial number before installation. The unit interfaces directly with the HOUS.FRONT SECT and requires the TUBE 4656301037 for proper fluid routing. For rear-mounted applications, the HOUSING REAR PART 4656301042 must be aligned during reassembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101028 | TRANSMISSION HOUSING | Main structural casing that encloses the gear train and control unit |
| 4656301066 | HOUS.FRONT SECT | Front section housing that supports the input shaft and pump |
| 4656201015 | SCREEN SHEET | Fine-mesh filter that protects the control unit from debris |
| 4656301037 | TUBE | Fluid transfer tube connecting the control unit to the cooler circuit |
| 0634313514 | O-RING | Seals the control unit mounting flange against oil leaks |
| 0636100803 | CAP SCREW | M8 bolt for securing the control unit to the valve body |
| 4656301042 | HOUSING REAR PART | Rear housing section that supports the output flange |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for precise positioning of the control unit |
| 0636100801 | CAP SCREW | M6 bolt for attaching the wiring harness bracket |
| 0636100160 | CAP SCREW | M10 bolt for securing the housing cover |
Frequently Asked Questions
Q: Can the 6057.018.218 control unit be repaired, or must it be replaced?
A: While some shops attempt to re-solder cracked joints, ZF recommends full replacement. The unit’s internal pressure sensors and solenoid coils are potted in epoxy; any moisture ingress causes irreversible damage. Always replace the O-RING 0634313514 during installation to prevent future leaks.
Q: How do I know if my WG171 needs this control unit or just a software update?
A: If the transmission exhibits hard shifts only at specific RPM ranges, a software flash may suffice. However, if you have physical symptoms like fluid in the connector pins or intermittent no-move conditions, the 6057.018.218 hardware is likely compromised. Check the SCREEN SHEET for debris as a secondary indicator.
Q: Is the 6057.018.218 interchangeable with earlier WG171 control units?
A: No. This revision (218) uses a different internal pressure regulator than the 217 suffix. Installing an older unit can cause solenoid overcurrent. Always match the full part number and verify the HOUS.FRONT SECT casting number to confirm compatibility.
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ZF 6057.018.218 CONTROL UNIT – Control Unit RFQ Support
PartsZF helps B2B buyers source ZF 6057.018.218 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 6057.018.218 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Documentation reference: 4656073033
- 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 | 6057.018.218 |
|---|---|
| Normalized SKU | 6057018218 |
| 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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