Holley EFI Terminator X Max Transmission Controller 4L80 4L90 37021XK Jeep Wrangler CJ5 CJ7 EQ TCC294A Jeep Wrangler CJ5 CJ7 CJ8 YJ 1976 95 OBD II Diagnostic Port To Assist In Vehicle Calibration Upload Within Terminator X V3 PC Software o Virtual Torque Management Tables o Virtual TPS Tables to dial in shift characteristics regardless of engine o DBW and Timing torque reduction tables to create smooth shifts Within the Holley EFI OBDII Transmission Tuning Handheld o Ability to read and clear TCM fault codes o Ability to raise and lower shift points by MPH or RPM Support for Tap Up Tap Down & Transmission's Secondary Shift Mode If you currently have a Terminator X ECU upgrading to a Terminator X Max ECU can be easily done by plugging your main harness into the Max ECU and re uploading your existing calibration Terminator X V3 software also allows a user to control the Secondary Shift Mode within the Transmission TCM and allows use of Tap Up Down Shifting