ZF 6073.015.134 EST 37 A for WG210 | OEM Genuine Part

Overview

The ZF 6073.015.134 EST 37 A is a critical electro-hydraulic control unit specifically engineered for the WG 210 Series transmission. This OEM genuine part, identified by SKU 6073.015.134, governs the precise modulation of clutch pressure and shift timing within the valve body assembly. By interpreting electronic signals from the transmission control module, it directs hydraulic flow to actuate gear changes, ensuring smooth power delivery and optimal torque management. This component is mounted directly onto the main TRANSMISSION HOUSING, where it interfaces with the internal oil circuits to regulate shift feel and prevent driveline shock.

Symptoms of Failure

• Erratic or harsh shifting: When the EST 37 A solenoid begins to fail, operators often experience abrupt gear engagements or delayed shifts, particularly under load. This symptom is frequently searched as “ZF WG210 hard shifting fix.”
• Transmission slipping in forward gears: A worn unit can cause insufficient hydraulic pressure, leading to clutch pack slip during acceleration. This is a common complaint for “WG210 transmission slipping uphill.”
• No reverse engagement: Complete failure of the solenoid pack may result in a total loss of reverse gear while forward gears remain operational, a specific failure mode for “ZF 6073.015.134 no reverse.”
• Check engine or transmission warning light: Internal electrical shorts or resistance changes trigger diagnostic trouble codes (DTCs), often accompanied by the transmission entering a limp-home mode.

Technical Specifications

Compatibility

This EST 37 A solenoid pack is primarily designed for the ZF WG 210 Series, but it also shares hydraulic architecture with the WG 180 and WG 200 models. It is a direct replacement for transmissions used in municipal trucks, refuse vehicles, and medium-duty construction equipment. The unit is installed adjacent to the HOUS.FRONT SECT and the HOUSING REAR PART, forming the core of the shift control system. For complete assembly, it works in conjunction with the HOUSING REAR SECTION to seal the hydraulic circuit.

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