Overview
The ZF 6073.315.475 EPROM MEMORY is a critical electronic component designed specifically for the WG 160 Series heavy-duty transmissions. This OEM genuine part stores the transmission’s operational firmware and calibration data, governing shift timing, clutch pressure modulation, and torque converter lock-up strategies. Positioned within the transmission control unit (TCU) housing, the EPROM ensures precise communication between the mechanical gearset and the vehicle’s electronic control system. The SKU 6073.315.475 is factory-programmed to match the exact specifications of your WG160, guaranteeing seamless integration and optimal performance. Without this memory chip, the transmission cannot execute its programmed shift logic, leading to erratic behavior or complete system failure.
Symptoms of Failure
- Erratic shifting and gear hunting: When the EPROM fails, the transmission may randomly shift between gears or fail to hold a selected gear, especially under load. This is often misdiagnosed as a mechanical valve body issue.
- Delayed or harsh engagement: A worn EPROM can cause a noticeable lag when shifting from Park to Drive or Reverse, accompanied by a jarring engagement. This symptom worsens as the chip degrades over time.
- Loss of memory after power cycle: The transmission may forget learned adaptive values, requiring a full relearn procedure every time the ignition is cycled. This leads to inconsistent shift quality and reduced fuel efficiency.
- No communication with diagnostic tools: A completely failed EPROM will prevent the TCU from communicating with scan tools, displaying a “no communication” error code. This is a definitive sign that the memory chip requires replacement.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number / SKU | 6073.315.475 |
| OEM Reference | ZF Genuine Part |
| Material | Epoxy-encapsulated silicon die with gold-plated pins |
| Dimensions (L x W x H) | 28 mm x 14 mm x 4 mm |
| Weight | 5 grams (0.18 oz) |
| Operating Temperature | -40°C to +125°C |
| Memory Type | UV-erasable EPROM (One-Time Programmable) |
| Data Retention | 10+ years under normal operating conditions |
Compatibility
This EPROM memory is primarily engineered for the ZF WG 160 Series transmission, but it also serves as a direct replacement for select models in the WG180, WG200, and WG210 families when the TCU hardware revision matches. The 6073.315.475 is not backward-compatible with older WG150 or WG120 units due to different pin configurations and voltage requirements. Always verify your transmission’s TCU part number before ordering. For installations involving the WG160, this EPROM works in conjunction with the TRANSMISSION HOUSING, HOUS.FRONT SECT, HOUSING REAR PART, and HOUSING REAR SECTION to form the complete electronic enclosure assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101055 | TRANSMISSION HOUSING | Main structural casing for the gearset and valve body |
| 4656201075 | HOUS.FRONT SECT | Front section of the transmission housing, supports input shaft |
| 4656201076 | HOUSING REAR PART | Rear housing section, encloses output shaft and PTO |
| 4656298047 | HOUSING REAR SECTION | Alternate rear housing variant for specific WG160 builds |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing assembly |
| 4656301148 | FIXING PLATE | Secures EPROM and TCU board inside housing |
| 0636100817 | CAP SCREW | Fastener for fixing plate and housing sections |
| 4656301016 | SCREEN SHEET | Filter screen for hydraulic fluid (variant A) |
| 4656301017 | SCREEN SHEET | Filter screen for hydraulic fluid (variant B) |
| 0636100803 | CAP SCREW | Alternate fastener for housing rear section |
Frequently Asked Questions
Q: Can I reprogram the 6073.315.475 EPROM myself?
A: No. This is a one-time programmable (OTP) EPROM. It must be ordered pre-programmed with the correct firmware for your specific WG160 transmission variant. Attempting to reprogram it will permanently damage the chip.
Q: How do I know if my WG160 needs this EPROM or a different memory chip?
A: Check the TCU label on your transmission. The EPROM part number is usually printed directly on the chip itself. If the label is missing or damaged, use a diagnostic tool to read the TCU hardware ID. The 6073.315.475 is only compatible with TCU revisions that have a 28-pin DIP socket.
Q: Will replacing the EPROM require a transmission fluid change?
A: No, the EPROM is an electronic component located in the TCU, which is external to the fluid circuit. However, if you are also replacing the TRANSMISSION HOUSING or other mechanical parts, a fluid change is recommended as per ZF service guidelines.
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