ZF 6073.015.156 EST 37 A for WG190 | OEM Genuine Part

Overview

The ZF 6073.015.156 EST 37 A for WG190 is a critical electro-hydraulic control unit designed to manage shift timing and pressure regulation within the WG 190 Series transmission. This OEM genuine part, identified by SKU 6073.015.156, integrates directly with the valve body assembly to direct oil flow for clutch engagement and gear selection. It interfaces seamlessly with the TRANSMISSION HOUSING and the HOUS.FRONT SECT, ensuring precise hydraulic command across all operating ranges. Without this component, the transmission cannot achieve proper shift logic or pressure modulation.

Symptoms of Failure

• Erratic or delayed gear engagement: When the EST 37 A wears, you may experience hesitation when shifting from neutral to drive or reverse, often accompanied by a harsh clunk.
• Intermittent transmission slipping under load: A failing unit causes pressure loss, leading to RPM flare during acceleration without corresponding vehicle speed increase.
• Hydraulic fluid contamination or burnt smell: Internal seal degradation allows debris to circulate, producing dark, gritty fluid and a distinct burnt odor from the transmission pan.
• No forward or reverse movement in cold conditions: Worn solenoids or spool valves fail to regulate cold oil viscosity, resulting in a complete loss of drive until the transmission warms up.

Technical Specifications

Compatibility

This EST 37 A unit is specifically engineered for the ZF WG 190 Series, but it also cross-fits into WG 180, WG 200, and WG 210 transmissions with identical valve body configurations. It is not compatible with the Ecomat or Ecolife series without adapter plates. When replacing this unit, always inspect the HOUSING REAR PART and HOUSING REAR SECTION for wear or scoring, as misalignment can cause premature failure of the new EST assembly.

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