This mod features an 18 and an 20 speed transmission that’s made for heavy loads and efficient hauling. The differential_ratio for the ultra transmissions is: 2.83 The differential_ratio for the transmissions is: 2.94 Feedback is very important to us **Please Do Not Edit The Files!!** You may find bugs, if you do, report them in the comments section SCS Trucks supported: Kenworth W900 (SCS) Peterbilt 389 (SCS) Volvo VNL (SCS) Peterbilt 579 (SCS) Mack Anthem (SCS) Freightliner Cascadia (SCS) 18-20 Speed Transmission News / Updates: – Added Spicer 18 speed and 18 speed retarder to all trucks – Added Spicer 20 speed and 20 speed retarder to all trucks – Added Eaton Fuller 13 speed transmission to all the freightliner trucks trainguy, Rc FlashDriver, Dmitry Trots, PikPikker