ZF 6073.015.019 EST 37 A for WG190 | OEM Genuine Part

Overview

The ZF 6073.015.019 EST 37 A for WG190 is an OEM genuine electronic control unit (ECU) or solenoid valve assembly designed to manage hydraulic pressure modulation within the WG 190 series transmission. This critical component governs shift timing and clutch engagement, ensuring smooth power delivery under heavy-duty loads. As a direct replacement for part number 6073.015.019, it interfaces directly with the main valve body to regulate oil flow. For structural integrity, this assembly mounts within the 4657101082: TRANSMISSION HOUSING, which protects the internal gear train from contamination.

Symptoms of Failure

• Erratic or delayed gear engagement: When the EST 37 A fails, operators often experience hesitation when shifting from neutral to drive or reverse, particularly under load.
• Intermittent transmission slipping: A worn solenoid or control module causes the transmission to slip out of gear during acceleration, leading to RPM flare without corresponding vehicle speed increase.
• Harsh or clunking shifts: Loss of precise pressure control results in abrupt, jarring gear changes that can be felt throughout the driveline.
• Persistent diagnostic trouble codes (DTCs): Fault codes related to solenoid circuit malfunctions or pressure regulation errors will appear, often accompanied by a check-engine or transmission warning light.

Technical Specifications

Compatibility

This part is specifically engineered for the ZF WG 190 transmission series, but it also fits select models within the WG180 and WG200 families due to shared valve body architecture. It is commonly used in WG180, WG190, and WG200 off-highway transmissions found in wheel loaders, graders, and dump trucks. Always verify the existing control module part number before installation. The 4657201166: HOUS.FRONT SECT and 4657201170: HOUSING REAR PART must be inspected for wear when replacing this unit, as housing distortion can accelerate failure. Additionally, the 4657298102: HOUSING REAR SECTION provides critical alignment for the output shaft assembly.

Related Components