ZF 6073.015.552 EST 37 A for WG210 | OEM Genuine Part

Overview

The ZF 6073.015.552 EST 37 A for WG210 is a critical electro-hydraulic control unit that governs shift timing and pressure modulation within the transmission. Positioned as the central valve body assembly, this OEM genuine part directs oil flow to clutches and brakes, ensuring seamless gear engagement under load. The SKU 6073.015.552 interfaces directly with the TRANSMISSION HOUSING and the HOUS.FRONT SECT, forming the hydraulic brain of the WG 210 Series. Precision-machined solenoids and spools within this unit regulate line pressure, making it indispensable for consistent power delivery in heavy-duty applications.

Symptoms of Failure

• Delayed or harsh shifting: Worn internal seals cause pressure loss, leading to sluggish engagement or jarring gear changes, especially under load.
• Transmission slipping in higher gears: A failing EST 37 A unit cannot maintain clutch pack pressure, resulting in RPM flare without acceleration.
• Erratic shift patterns or limp mode: Faulty solenoid feedback forces the transmission controller to default to a safe mode, often triggered by internal debris or electrical degradation.
• Visible oil leaks near the valve body: Cracks in the housing or degraded gaskets allow ATF to weep from the interface with the HOUSING REAR PART.

Technical Specifications

Compatibility

This genuine ZF part is engineered for the WG 210 Series but shares hydraulic architecture with several other ZF models. It is directly compatible with WG180, WG200, and WG250 transmissions used in municipal trucks, refuse vehicles, and construction equipment. The unit also fits select WG 211 and WG 310 variants when paired with the correct HOUSING REAR SECTION. Always verify the transmission serial number against the EST 37 A designation to ensure proper solenoid calibration.

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