Transmissions, chassis and engines now for all trucks. 1.1 Now includes International LT for 1.43+ 24 Speed AmTech Custom Built Transmission for all trucks - High fuel econemy First gear 16.00, Last 0.50 +Retarder High power Cummins ISX15 750 for all trucks - Heavy hauler, low economy Horsepower 750 - Torque at 1200 RPM 3282 RPM max limit 3000 - 2500 for 49x, Lonestar, Cascadia, LT RPM auto shift 2600 high - 2400 for 49x, Lonestar, Cascadia, LT High power Cummins ISX15 760 Turbo for all trucks - High fuel economy Horsepower 760 - Torque at 1200 RPM 3326 RPM max limit 3000 - 2500 for 49x, Lonestar, Cascadia, LT RPM auto shift 2600 high - 2400 for 49x, Lonestar, Cascadia, LT Various chassis for all trucks with AdBlue tanks to support turbo engines with mods ranging from short, mid and long. 400-500-600gal, 4x4 6x6 8x8.