This plug-and-play transmission control harness expands the transmission control options for Holley EFI systems, providing a simplified installation for 1998-and-newer Ford 4R70W and 4R75W electronic transmissions using J4 connectors.
Specifications:
- Application: 1998+ Ford 4R70W/4R75W transmissions
- Connector: J4
- Compatible ECUs: Dominator and Terminator X Max only
- Required Software: Version 4.0 build 32 or higher
- Required ECU Firmware: Version 4.0 build 110 or higher
- Part Number: 558-470
Not compatible with 4WD installations. All 10 pins are terminated at the transmission connector; unused pins do not need to be removed before installation. Includes an extra pressure transducer connector for an optional line pressure sensor (Holley P/N 554-136).
FAQ
What transmissions does this harness fit?
It's designed for 1998-and-newer Ford 4R70W and 4R75W automatic transmissions.
What ECUs is this harness compatible with?
Only Dominator and Terminator X Max ECUs, running software version 4.0 build 32+ and ECU firmware 4.0 build 110+.
Can this harness be used in a 4WD vehicle?
No, this harness is not compatible with 4WD installations.

