Overview
The ZF 6057.018.618 EST 37 A is a genuine OEM control valve assembly engineered specifically for the WG 210 series transmission. This critical hydraulic component regulates clutch engagement and shift timing by directing oil flow through the valve body. Positioned within the main transmission casing, it interfaces directly with the TRANSMISSION HOUSING to ensure precise pressure modulation. The SKU 6057.018.618 is manufactured to ZF’s original tolerances, guaranteeing seamless integration with factory-spec hydraulic circuits.
Symptoms of Failure
- Delayed or harsh gear engagement: Worn spools or springs cause sluggish shifts or abrupt clutch application, especially during cold starts.
- Erratic shift patterns: The transmission may hunt between gears or skip ratios due to inconsistent pilot pressure from the EST 37 A.
- Internal hydraulic leaks: Degraded seals within the valve body allow ATF to bypass, leading to low line pressure and eventual clutch slip under load.
- Torque converter shudder: Faulty modulation in the lock-up circuit produces vibration during converter clutch application at highway speeds.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 6057.018.618 |
| OEM Reference | ZF EST 37 A |
| Material | High-strength aluminum alloy with hardened steel spools |
| Weight | 2.8 kg (6.2 lbs) |
| Dimensions (L×W×H) | 320 mm × 180 mm × 95 mm |
| Operating Pressure | 12–18 bar (174–261 psi) |
| Seal Type | Nitrile rubber (NBR) O-rings |
Compatibility
This EST 37 A valve assembly is designed for the ZF WG 210 series, but it also fits select variants of the WG 180 and WG 200 transmissions when used with the correct HOUS.FRONT SECT and HOUSING REAR PART. It is compatible with WG 210-100 through WG 210-600 models manufactured after 2012. For WG 200 applications, verify that the HOUSING REAR SECTION matches the valve body bolt pattern. Always cross-reference your transmission serial number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural casing for gear and valve assemblies |
| 4657201166 | HOUS.FRONT SECT | Front section housing the pump and torque converter |
| 4657201170 | HOUSING REAR PART | Rear casing supporting output shaft and planetary gears |
| 4657298102 | HOUSING REAR SECTION | Extended rear housing for auxiliary drive units |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for valve body positioning |
| 0636100801 | CAP SCREW | M8 bolt for securing valve body to housing |
| 4656301148 | FIXING PLATE | Retainer plate for valve body springs |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for pump intake |
| 0636100803 | CAP SCREW | M10 bolt for housing flange connections |
