Overview
The ZF 6057.018.774 EST 37 A is a genuine OEM solenoid valve assembly specifically engineered for the WG 210 series powershift transmission. This electro-hydraulic component regulates clutch pressure and shift timing, ensuring smooth gear engagement under heavy load conditions. As a direct replacement for part number 6057.018.774, it restores precise hydraulic control within the valve body. This part works in conjunction with the 4657101082: TRANSMISSION HOUSING to maintain proper fluid routing and pressure integrity.
Symptoms of Failure
- Erratic gear engagement or delayed shifting – When the EST 37 A solenoid loses internal sealing, hydraulic pressure drops, causing hesitation between forward and reverse gears.
- Intermittent transmission slipping under load – Worn coils or stuck spools lead to clutch pack slippage, especially during uphill hauling or heavy towing.
- Transmission fluid contamination or burnt smell – Internal debris from a failing solenoid can circulate through the system, accelerating wear on the 4657201166: HOUS.FRONT SECT and adjacent valve bores.
- Diagnostic trouble codes for shift solenoid circuit – Modern ZF controllers detect resistance changes in the 6057.018.774 coil, triggering warning lights and limp-home mode.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 6057.018.774 (EST 37 A) |
| OEM Reference | ZF 6057.018.774 |
| Material | Hard-anodized aluminum body with stainless steel spool |
| Weight | 0.85 kg (1.87 lbs) |
| Coil Resistance | 5.2–6.8 Ω at 20°C |
| Operating Pressure | 8–22 bar (116–319 psi) |
| Seal Type | Viton O-rings (included) |
Compatibility
This solenoid is primarily designed for the WG 210 Series transmission, but it also fits select variants in the WG180, WG200, and WG250 families. It directly replaces the earlier EST 36 and EST 38 solenoid configurations. For proper installation, ensure the 4657201170: HOUSING REAR PART and 4657298102: HOUSING REAR SECTION are free of corrosion and debris. Always verify the solenoid bore alignment with the valve body casting to prevent cross-threading.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural casing for gear train and valve body |
| 4657201166 | HOUS.FRONT SECT | Front section housing pump and torque converter |
| 4657201170 | HOUSING REAR PART | Rear casing supporting output shaft and PTO |
| 4657298102 | HOUSING REAR SECTION | Extension housing for rear bearing support |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for solenoid mounting flange |
| 0636100801 | CAP SCREW | M8x25 bolt for solenoid retention |
| 4656301148 | FIXING PLATE | Retaining plate for solenoid harness connector |
| 4657301032 | SCREEN SHEET | Fine mesh filter for solenoid inlet port |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for valve body |
| 0636100803 | CAP SCREW | M6x20 bolt for screen sheet retention |
