ZF 6073.015.155 EST 37 A for WG190 | OEM Genuine Part

Overview

This OEM genuine ZF 6073.015.155 EST 37 A is a critical control component specifically engineered for the WG 190 series transmission. It functions as the electro-hydraulic shift actuator, precisely managing clutch pressure and gear engagement within the transmission’s valve body. By converting electronic signals from the transmission control unit (TCU) into hydraulic actions, this part ensures smooth, reliable shifting under heavy-duty loads. The SKU 6073.015.155 is a direct factory replacement, guaranteeing exact fit and performance for your ZF drivetrain. It works in concert with the TRANSMISSION HOUSING to maintain internal pressure integrity and is often serviced alongside the HOUS.FRONT SECT during a major overhaul.

Symptoms of Failure

When the ZF 6073.015.155 EST 37 A begins to fail, operators will notice distinct operational issues. The most common symptom is delayed or harsh gear engagement, where the transmission hesitates before shifting or slams into gear. Another clear indicator is intermittent loss of drive in forward gears, often accompanied by a “limp mode” activation. You may also detect ATF fluid contamination from internal wear particles, which can clog the SCREEN SHEET filters. Finally, erratic shifting under load—where the transmission hunts for gears or slips during acceleration—points directly to a worn EST 37 A actuator.

Technical Specifications

Compatibility

This genuine ZF 6073.015.155 EST 37 A is primarily designed for the WG 190 Series transmission. It is also compatible with the WG 180 and WG 200 series models that share the same electro-hydraulic control architecture. The part interfaces directly with the HOUSING REAR PART and the HOUSING REAR SECTION to form a sealed actuator chamber. Always verify your transmission serial number before ordering to ensure correct fitment.

Related Components

Frequently Asked Questions

Q: Can I replace the ZF 6073.015.155 EST 37 A without removing the transmission?
A: In most WG 190 applications, the actuator is accessible after removing the transmission oil pan and valve body. However, access may be restricted on certain vehicle chassis. We recommend consulting your service manual for specific removal procedures.

Q: What is the typical lifespan of this EST 37 A actuator?
A: Under normal operating conditions with regular fluid changes, the 6073.015.155 typically lasts 300,000 to 500,000 kilometers. Contaminated fluid or frequent heavy towing can significantly reduce its service life.

Q: Does this part include the solenoid coils?
A: Yes, the 6073.015.155 EST 37 A is a complete assembly that includes the integrated solenoid valves and electrical connector. No additional components are required for installation.