Overview
The ZF 6073.015.237 EST 37 A is a critical electro-hydraulic control unit specifically engineered for the WG 210 Series transmission. This OEM genuine part governs the modulation of clutch pressure and shift timing, ensuring precise gear engagement under varying load conditions. Positioned within the valve body assembly, it interfaces directly with the transmission control module to regulate hydraulic flow. The SKU 6073.015.237 is a direct replacement for failed units, restoring factory shift quality and preventing driveline damage. When paired with a robust 4657101082: TRANSMISSION HOUSING, this component ensures structural integrity and fluid containment under high-pressure operation.
Symptoms of Failure
- Erratic or delayed gear engagement — A worn EST 37 A often causes hesitation when shifting from neutral to drive or reverse, particularly under cold start conditions.
- Intermittent transmission slipping — You may notice the transmission unexpectedly slips out of gear during acceleration, as the unit fails to maintain consistent clutch pressure.
- Harsh or jarring shift quality — When the solenoid or valve spool sticks, shifts become abrupt, leading to increased wear on the 4657201166: HOUS.FRONT SECT and adjacent planetary gearsets.
- Transmission fluid contamination — Internal debris from a failing EST 37 A can circulate through the system, clogging the 4657301032: SCREEN SHEET and reducing overall hydraulic efficiency.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 6073.015.237 |
| Designation | EST 37 A |
| Material | Hardened steel / aluminum alloy |
| Weight | 1.45 kg (3.2 lbs) |
| Length | 187 mm |
| Width | 98 mm |
| Height | 62 mm |
| OEM Reference | ZF 6073.015.237 |
| Operating Pressure | 8–16 bar |
| Temperature Range | -30°C to +120°C |
Compatibility
This EST 37 A unit is primarily designed for the WG 210 Series transmission family, but it also fits select variants of the WG180, WG200, and WG250 models when used in medium-duty commercial vehicles. It is compatible with both 6-speed and 8-speed configurations that utilize the same valve body architecture. For proper sealing, always inspect the 4657201170: HOUSING REAR PART and the 4657298102: HOUSING REAR SECTION for cracks or warping before installation. Verify your transmission’s serial number against ZF’s OEM catalog to confirm fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Encloses and supports all internal transmission components |
| 4657201166 | HOUS.FRONT SECT | Front section housing for pump and torque converter |
| 4657201170 | HOUSING REAR PART | Rear housing section for output shaft support |
| 4657298102 | HOUSING REAR SECTION | Extended rear housing for PTO mounting |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing mating surfaces |
| 0636100801 | CAP SCREW | M10 bolt for securing valve body assembly |
| 4656301148 | FIXING PLATE | Retaining plate for solenoid harness |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for sump pickup |
| 0636100803 | CAP SCREW | M8 bolt for housing flange connection |
