ZF 6073.023.350 TCU ERGOPOWER M EC3A for WG191 | OEM Genuine Part

Overview

The ZF 6073.023.350 TCU ERGOPOWER M EC3A for WG191 is a critical electronic control unit that governs shift timing, clutch modulation, and diagnostic communication within the transmission assembly. Positioned directly on the valve body, this OEM genuine part interprets sensor data to ensure precise gear engagement under varying load conditions. The SKU 6073.023.350 is engineered specifically for the WG 191 Series, replacing worn or failed controllers to restore factory performance. Without this TCU, the transmission cannot execute its adaptive shift strategy, leading to degraded driveline efficiency.

Symptoms of Failure

• Erratic shifting or gear hunting — The transmission may randomly upshift or downshift without driver input, often triggered by a failing TCU that misreads speed signals.
• Delayed engagement or no forward/reverse — A worn 6073.023.350 can cause a 3-5 second lag when shifting from Park to Drive, or complete loss of gear selection.
• Transmission warning lamp with code P0700 — The ECU logs generic powertrain faults when the TCU loses communication, often accompanied by limp-home mode activation.
• Intermittent loss of power under load — The controller may fail to modulate clutch pressure during heavy hauling, causing momentary torque interruptions.

Technical Specifications

Parameter	Value
Part Number	6073.023.350
OEM Reference	ZF ERGOPOWER M EC3A
Material	Aluminum housing with sealed PCB
Weight	1.2 kg (2.65 lbs)
Dimensions (L x W x H)	210 mm x 140 mm x 55 mm
Operating Voltage	12V / 24V compatible
Connector Type	40-pin AMP

Compatibility

This TCU is primarily designed for the ZF WG 191 Series transmissions, commonly found in medium-duty trucks and construction equipment. It is also compatible with the WG180 and WG200 models when used with the appropriate harness adapters. The 6073.023.350 replaces earlier EC3A variants in the ERGOPOWER family, ensuring backward compatibility with WG190 and WG210 assemblies. Always verify the transmission serial number before installation.

Installation Context

During replacement, the TCU mounts directly onto the TRANSMISSION HOUSING, which must be free of cracks or corrosion. The HOUS.FRONT SECT and HOUSING REAR PART provide structural alignment for the control unit, while a CYLINDRICAL PIN ensures precise dowel alignment during assembly. Improper seating of these components can cause connector damage or fluid ingress.

Related Components

Part Number	Name	Function
4657101087	TRANSMISSION HOUSING	Main structural casing for gear train and valve body
4657301172	HOUS.FRONT SECT	Front section housing the torque converter and pump
4657301173	HOUSING REAR PART	Rear section supporting output shaft and PTO mount
0631306816	CYLINDRICAL PIN	Alignment dowel for housing-to-TCU interface
0636102489	CAP SCREW	M10 fastener for securing valve body cover
4656301148	FIXING PLATE	Retainer plate for TCU mounting bracket
0636102463	CAP SCREW	M8 bolt for housing-to-bellhousing connection
4657201133	SCREEN SHEET	Fine mesh filter protecting hydraulic passages
0636115287	CAP SCREW	M12 bolt for rear housing flange
4657301065	PLATE	Spacer plate between TCU and valve body

Frequently Asked Questions

Q: Can the 6073.023.350 be reprogrammed for different shift patterns?
A: Yes, this TCU supports flash programming via ZF’s diagnostic tool, allowing custom shift schedules for vocational applications like dump trucks or concrete mixers.

Q: Will this part work with a WG180 transmission from 2005?
A: The 6073.023.350 is physically compatible with WG180 units, but you must verify the harness connector pinout—early models may require an adapter cable.

Q: What causes premature TCU failure in the WG191?
A: Common causes include voltage spikes from faulty alternators, moisture ingress through damaged housing seals, and vibration fatigue from loose mounting bolts.