Overview
This OEM genuine ZF 6057.018.517 EST 37 A is a critical control component specifically engineered for the WG 160 Series transmission. It functions as the electro-hydraulic shift actuator, precisely managing clutch pressure and gear selection within the transmission’s valve body. The SKU 6057.018.517 ensures accurate modulation of hydraulic flow, enabling smooth shifts under heavy load conditions. When installed alongside the 4656101055: TRANSMISSION HOUSING, this part forms the core of the shift control system, directly interfacing with the transmission control unit to execute gear changes.
Symptoms of Failure
- Erratic or harsh shifting under load: A worn EST 37 A unit causes delayed or abrupt gear engagements, particularly when towing or climbing grades.
- Transmission stuck in limp mode: Internal solenoid failure triggers fault codes, forcing the WG160 into a single-gear safety mode.
- Intermittent loss of drive: Hydraulic pressure fluctuations from a failing actuator lead to momentary power interruptions during acceleration.
- ATF contamination from internal wear: Degraded seals within the 6057.018.517 allow metallic debris to circulate, accelerating damage to the 4656201075: HOUS.FRONT SECT and valve body.
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 6057.018.517 |
| Designation | EST 37 A (Electro-Hydraulic Shift Actuator) |
| Material | Anodized aluminum housing with steel solenoid cores |
| Weight | 2.4 kg (5.3 lbs) |
| Operating Voltage | 12V / 24V (PWM controlled) |
| Hydraulic Pressure Range | 5–22 bar |
| Seal Type | Viton O-rings (high-temperature rated) |
| OEM Reference | ZF 6057.018.517 |
Compatibility
This genuine ZF part is primarily designed for the WG 160 Series transmission, but it also cross-fits select variants in the WG180 and WG200 families that share the same valve body architecture. It is a direct replacement for transmissions built between 2012–2023. For proper installation, verify that the 4656201076: HOUSING REAR PART and 4656298047: HOUSING REAR SECTION are free of cracks or warping, as misalignment will damage the new actuator.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101055 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4656201075 | HOUS.FRONT SECT | Front section housing torque converter |
| 4656201076 | HOUSING REAR PART | Rear housing for output shaft support |
| 4656298047 | HOUSING REAR SECTION | Extended rear section for PTO mounting |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 4656301148 | FIXING PLATE | Retains actuator in valve body bore |
| 0636100817 | CAP SCREW | M8 bolt for housing fastening |
| 4656301016 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4656301017 | SCREEN SHEET | Coarse mesh pre-filter for sump |
| 0636100803 | CAP SCREW | M6 bolt for valve body attachment |
Frequently Asked Questions
Q: Can the 6057.018.517 be repaired, or must it be replaced?
A: This is a sealed electro-hydraulic unit with non-serviceable internal solenoids. Replacement with the OEM genuine part is required if diagnostics confirm internal failure.
Q: Does this part require programming after installation?
A: Yes, the EST 37 A must be calibrated to the transmission control unit using ZF diagnostic software. Failure to perform adaptive learning will result in shift quality issues.
Q: What is the typical service life of this actuator?
A: Under normal operating conditions with clean ATF, the 6057.018.517 lasts 300,000–500,000 km. Contaminated fluid or frequent high-load operation can reduce lifespan significantly.
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Phone: +86 158 2286 3467 |
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