Overview
The ZF 6073.015.167 EST 37 A is a critical electro-hydraulic control unit specifically designed for the WG 210 Series transmission. This genuine OEM part governs the precise modulation of clutch pressure and shift timing, ensuring smooth gear transitions under heavy load. As the electronic brain of the hydraulic system, the EST 37 A receives signals from the transmission control module and converts them into hydraulic commands. The SKU 6073.015.167 is the definitive identifier for this specific valve body assembly, which is mounted directly onto the HOUS.FRONT SECT and interfaces with the main TRANSMISSION HOUSING to regulate oil flow throughout the gearset.
Symptoms of Failure
When the ZF 6073.015.167 EST 37 A begins to degrade, operators often notice erratic shifting or harsh engagement between gears, particularly when the transmission is cold. A second common failure mode is delayed forward or reverse engagement, where the vehicle hesitates for several seconds before moving. You may also experience intermittent loss of gear ratio or the transmission slipping into neutral unexpectedly under moderate acceleration. Finally, internal hydraulic leaks caused by worn solenoids within this unit can lead to low line pressure, triggering fault codes and forcing the system into limp-home mode.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 6073.015.167 |
| Designation | EST 37 A (Electro-Hydraulic Control Unit) |
| Material | Die-cast aluminum housing with steel spool valves |
| Weight | 4.2 kg (9.3 lbs) |
| OEM Reference | ZF 6073.015.167 |
| Operating Pressure | 12-18 bar (174-261 psi) |
| Voltage Range | 12V / 24V compatible |
| Seal Type | NBR (Nitrile) O-rings |
Compatibility
This genuine ZF part is primarily engineered for the WG 210 Series transmission, but it is also compatible with several other ZF models that share the same hydraulic architecture. The EST 37 A can be installed in the WG 180, WG 200, and WG 211 series transmissions. It is also found in certain off-highway variants of the WG 160 series. For proper fitment, the unit must be paired with the correct HOUSING REAR PART and the HOUSING REAR SECTION to ensure correct alignment of the valve bores.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural casing for gear and shaft assembly |
| 4657201166 | HOUS.FRONT SECT | Front section housing the torque converter and pump |
| 4657201170 | HOUSING REAR PART | Rear housing supporting output shaft and bearings |
| 4657298102 | HOUSING REAR SECTION | Intermediate rear section for clutch pack alignment |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating surfaces |
| 0636100801 | CAP SCREW | M10 fastener for securing valve body to housing |
| 4656301148 | FIXING PLATE | Retainer plate for solenoid harness |
| 4657301032 | SCREEN SHEET | Fine mesh filter for valve body inlet |
| 4657301033 | SCREEN SHEET | Secondary filter for return line |
| 0636100803 | CAP SCREW | M8 fastener for screen sheet retention |
Frequently Asked Questions
Q: Can I rebuild the ZF 6073.015.167 EST 37 A instead of replacing it?
A: While individual solenoids and seals can be replaced, the internal valve body bores wear over time. For reliable performance in WG210 applications, we recommend installing a new genuine OEM unit to avoid recurrent shift quality issues.
Q: Does this part require programming after installation?
A: No. The EST 37 A is a passive hydraulic control unit. It does not contain programmable memory. However, the transmission ECU may need a reset to clear adaptive shift pressure values after replacement.
Q: What is the typical lifespan of this unit?
A: In normal on-highway use, the EST 37 A typically lasts 300,000 to 500,000 miles. In severe off-road or high-torque applications, contamination from clutch wear can reduce service life to 150,000 miles.
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Phone: +86 158 2286 3467 |
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