changed some things on the wording in the transmission mod and change the image for the mod page on the game

-This update fixes the problems in 1.39
-This is a 500,000 Hp Engine with custom engine sounds for all trucks.
-This includes and custom 9 speed transmisson that will get you up to speeds of 230 mph or more
-Trucks that work:
---International Lonestar
---Kenworth t680
---Kenworth w900
---Mack Anthem
---Peterbilt 389
---Viper's Peterbilt 389v2
---Peterbilt 579
---Volvo vnl
---Westernstart 49x