Overview
The ZF 6057.018.593 EST 37 A for WG210 is a precision-engineered electro-hydraulic control unit that governs clutch modulation and shift timing within the WG series transmission. This OEM genuine part, identified by SKU 6057.018.593, integrates directly with the valve body assembly to regulate oil flow to planetary gear sets. It interfaces critically with the 4657101080: TRANSMISSION HOUSING to maintain proper hydraulic circuit sealing. Without this component, the transmission cannot execute smooth gear changes under load.
Symptoms of Failure
- Erratic shift hesitation during acceleration: When the EST 37 A solenoid degrades, you may experience delayed engagement between 2nd and 3rd gears, particularly under heavy torque loads.
- Intermittent loss of reverse gear: A failing unit often causes the WG210 to slip out of reverse when maneuvering on inclines, accompanied by a faint grinding noise.
- Hydraulic fluid contamination in the harness connector: Worn internal seals allow ATF to migrate into the electrical connector, triggering false diagnostic trouble codes (DTCs) for pressure sensors.
- Harsh downshifts at low RPM: The part’s inability to modulate pilot pressure results in jarring downshifts when decelerating from highway speeds.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 6057.018.593 |
| Designation | EST 37 A (Electro-Hydraulic Shift Solenoid) |
| Material | Hard-anodized aluminum body with Viton seals |
| Weight | 0.42 kg (0.93 lbs) |
| Operating Pressure Range | 8–22 bar |
| Coil Resistance | 5.4 Ω ± 0.3 Ω at 20°C |
| OEM Reference | ZF Friedrichshafen AG |
| Thread Pitch | M6 x 1.0 mounting bolts |
Compatibility
This solenoid is engineered for the ZF WG210 series, but it also cross-fits select models in the WG180, WG200, and WG250 families when used with the correct 4657201167: HOUS.FRONT SECT adapter plate. It is not compatible with pre-2005 WG150 units due to different hydraulic port geometry. Always verify the valve body casting number before installation. The part works in tandem with the 4657201171: HOUSING REAR PART to ensure proper oil gallery alignment in the WG210. For full assembly integrity, pair it with the 4657298103: HOUSING REAR SECTION when rebuilding the clutch pack area.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101080 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201167 | HOUS.FRONT SECT | Front section housing torque converter |
| 4657201171 | HOUSING REAR PART | Rear casing for output shaft support |
| 4657298103 | HOUSING REAR SECTION | Extended rear housing for PTO mounting |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0636100801 | CAP SCREW | M10 bolt for valve body retention |
| 4656301148 | FIXING PLATE | Locking plate for solenoid bracket |
| 4657301034 | SCREEN SHEET | Fine mesh filter for pilot circuit |
| 4657301035 | SCREEN SHEET | Coarse mesh filter for main line |
| 0636100803 | CAP SCREW | M8 bolt for housing flange |
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