The Terminator X Max Transmission Kit adds 2007-and-newer GM 6L80/6L90E transmission control to a Terminator X Max ECU by communicating with the factory TCM over CAN. The included handheld lets you dial in shift points, tire size, and gear ratio, while Terminator X V3 software adds torque management, secondary shift mode, and tap up/down shifting for smoother, more precise shifts.
Specifications:
- Category: Transmission
- Product Type: Terminator X Max 6L80 Transmission Control
- Requires: Terminator X Max ECU running V3 Build 100 or later
- Handheld: 3.5" LCD touchscreen tuner included
- Tire Size Diameter Range: 26"-38"
- Gear Ratio Range: 3.23-5.13
- 4WD Support: No
- Part Number: 558-499
Terminator X V3 software is not compatible with V1 or V2 ECU firmware — the ECU and handheld must be updated to V3 first, and loading a V1/V2 calibration into V3 software will convert it (a V3 calibration cannot go back into a V1/V2 ECU).
FAQ
What transmissions does the 558-499 kit control?
2007-and-newer GM 6L80 and 6L90E transmissions, communicating via CAN with the internal TCM.
Does this kit work with 4WD vehicles?
No, the system does not support 4WD applications.
What ECU and software version do I need?
A Terminator X Max ECU running V3 Build 100 or later firmware.
What can I adjust with the included handheld?
Shift points, tire size, and gear ratio, plus access to Tap Up/Tap Down and secondary shift mode.
