The engines include different sounds by models. Detroit Series 60 Cummins M11 Caterpillar C15 Paccar MX-13 Mack. The gearboxes incorporate models of 6, 7, 8, 12, 15, 16 and 18. It contains varieties of transmissions with retarder and without retarder. SOUNDS: aair brakes, engine sounds, reverse Sound ENGINES: -450PS -500PS 600PS -700PS -800PS -900PS -1000PS -2000PS -5000PS 10000PS TRUCKS: Mack Anthem Mack R Series Mack Titan Mack chu613 Kenworth W900 Kenworth T600 Kenworth T680 Kenworth K100 Kenworth W990 Razworth w900 by (allen rez) Kenworth T800 GTM Freightliner FLB by Harven Freightliner FLC, FLD Freightliner Cascadia 2019 Peterbilt 352,353,359,367,378,379,388,389,579 International Lonestar International Lt Rezbilt 389 Westernstar 49x, 57x, 4900, 5700xe Volvo ETC. Credits Raiden, jc, slav jerry