67-Pin Gearbox Control Module Wire Harness Connector – OEM 2278584 | Female

The OEM 2278584 is a high-density 67-pin female connector used in automatic gearbox control module (TCM) harnesses. This connector integrates TCM power, ground, CAN bus, solenoid control, and sensor circuits for the automatic transmission control system. Available bare for custom harness repair.

Key Specifications

Why TCM Connectors Fail

High-pin-count TCM connectors are vulnerable to ATF contamination, thermal cycling, and vibration from the gearbox. Terminal corrosion or fluid ingress causes multiple simultaneous transmission fault codes, harsh shifting, limp mode, or complete transmission failure to engage. A degraded 67-pin TCM connector causes P0700-series fault codes, U-code CAN bus communication faults, and multiple solenoid circuit errors simultaneously. Replacing the connector restores full TCM signal path integrity.

Installation Steps

1. Disconnect the vehicle battery and allow TCM to power down
2. Drain ATF if necessary to access the transmission connector
3. Use a terminal extraction tool to remove terminals from the original housing one-by-one
4. Transfer terminals to the new 2278584 housing maintaining exact pin positions – photograph the original connector before disassembly
5. Reconnect and use a compatible scanner to clear transmission fault codes
6. Perform a transmission adaptation reset if required

Frequently Asked Questions

Q: What vehicles use OEM 2278584?
A: This connector is used in automatic gearbox control module harnesses on vehicles using the 2278584 TCM connector. Cross-reference OEM 2278584 with your transmission wiring diagram to confirm fitment.

Q: What fault codes indicate a failed TCM connector?
A: Common codes include P0700 (TCM malfunction), P0715–P0720 (speed sensor faults), P0730–P0736 (incorrect gear ratio), P0750–P0770 (solenoid circuit faults), and U0101 (lost communication with TCM).

Q: Are all 67 terminals included?
A: Yes, the connector set includes the housing and all required terminals.

Compatible Applications

• Automatic gearbox control module (TCM) harness repair (OEM 2278584)
• High-density transmission harness applications requiring 67-pin female connectors