This mod has 6&12-speed transmissions, Better than Alison 4500 RDS and I-Shift ATO3112D transmission, suitable for shifter peripheral without shift button. Add Cummins ISX15 550HP&600HP Engine For Mack Anthem. Supported trucks so far: Freightliner Cascadia2019 International LT International Lonestar Kenworth T680 Kenworth W900 Mack Anthem Peterbilt 389 Peterbilt 579 Volvo VNL Kenworth K100E