ZF 6073.015.006 EST 37 A for WG191 | OEM Genuine Part

Overview

The ZF 6073.015.006 EST 37 A is a critical OEM genuine control component engineered specifically for the WG 191 Series transmission. This part regulates hydraulic pressure within the valve body assembly, ensuring precise clutch engagement and smooth gear transitions under heavy-duty loads. As a direct replacement for the original equipment, the SKU 6073.015.006 guarantees factory tolerances and material integrity, restoring shift quality and preventing premature wear in commercial vehicle drivelines. It interfaces directly with the 4657101049: TRANSMISSION HOUSING to maintain structural alignment during operation.

Symptoms of Failure

• Delayed or harsh shifting under load: When the EST 37 A wears, hydraulic pressure drops, causing noticeable lag between gear changes, especially when climbing grades.
• Intermittent transmission slippage: A failing unit cannot maintain clutch pack pressure, leading to momentary loss of torque transfer during acceleration.
• Fluid contamination from internal debris: Degraded seals or spool wear introduce metallic particles into the oil, often visible as dark streaks on the dipstick.
• Erratic neutral-to-drive engagement: Drivers may experience a sudden lurch or delayed response when shifting from park to drive at idle.

Technical Specifications

Compatibility

This genuine ZF part is primarily designed for the WG 191 Series but also fits select models in the WG180, WG200, and WG210 families when used with the correct housing configuration. It is a direct fit for transmissions paired with the 4657301130: HOUS.FRONT SECT and 4657301131: HOUSING REAR PART. Always verify alignment with the 0631306816: CYLINDRICAL PIN during installation to prevent misalignment of the valve body.

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