Overview
The ZF 6057.018.570 EST 37 A for WG160 is a critical electro-hydraulic control unit that governs shift timing and pressure modulation within the transmission. This OEM genuine part, identified by SKU 6057.018.570, sits directly on the valve body assembly and interfaces with the main housing to direct oil flow for clutch and brake engagement. Without this component, the transmission cannot execute gear changes reliably. It is precision-machined to ZF’s exacting tolerances and is often replaced in tandem with the TRANSMISSION HOUSING to ensure proper sealing and alignment.
Symptoms of Failure
- Erratic or delayed shifting: When the EST 37 A wears, hydraulic pressure drops, causing hesitation between gears—especially under load. This is a common search query for “WG160 shift delay repair.”
- Internal oil leaks: Degraded seals on the 6057.018.570 allow transmission fluid to bypass, leading to low pressure and visible drips near the valve body area.
- Harsh engagement: A failing unit fails to modulate clutch apply pressure, resulting in jarring shifts that worsen as the transmission warms up.
- No reverse or forward movement: Complete failure of the electro-hydraulic solenoid stack can leave the transmission in neutral, a symptom often searched as “ZF WG160 no drive.”
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 6057.018.570 |
| Designation | EST 37 A |
| Material | Aluminum alloy with steel solenoid cores |
| Weight | 1.8 kg (approx.) |
| Dimensions (L x W x H) | 210 mm x 140 mm x 65 mm |
| OEM Reference | ZF 6057.018.570 |
| Operating Pressure | 12–18 bar |
| Seal Type | Nitrile rubber O-rings |
Compatibility
This genuine ZF part is primarily designed for the WG 160 Series transmissions. It also fits the WG180, WG200, and WG210 models due to shared valve body architecture. Always verify your transmission serial number before ordering. The unit interfaces directly with the HOUS.FRONT SECT and the HOUSING REAR PART to form a sealed hydraulic circuit. For complete overhauls, the HOUSING REAR SECTION should also be inspected for wear.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101055 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4656201075 | HOUS.FRONT SECT | Front section of the housing assembly |
| 4656201076 | HOUSING REAR PART | Rear housing segment for clutch packs |
| 4656298047 | HOUSING REAR SECTION | Extended rear housing component |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing mating |
| 4656301148 | FIXING PLATE | Retains valve body components |
| 0636100817 | CAP SCREW | M10 fastener for housing bolts |
| 4656301016 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4656301017 | SCREEN SHEET | Secondary mesh filter element |
| 0636100803 | CAP SCREW | M8 fastener for valve body |
Frequently Asked Questions
Q: Can the 6057.018.570 be repaired, or must it be replaced?
A: Due to the integrated solenoid stack and precision calibration, ZF recommends replacement rather than repair. Attempting to rebuild this unit often leads to shift quality issues.
Q: How do I know if my WG160 needs this part?
A: If you have diagnostic trouble codes related to solenoid circuit faults (e.g., P0700 or P0740) combined with erratic shifting, the EST 37 A is a likely culprit. Always check wiring first.
Q: Is this part interchangeable with the EST 36 A?
A: No. The EST 37 A has a different hydraulic port layout and electrical connector. Using the wrong variant can cause immediate transmission damage.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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