That's a completely wrong thread for this but here you go anyway. It's in this Google Drive: https://drive.google.com/drive/folders/1biPHI-XaM3eP6rECjcrDmx0UkozJ_4VO?usp=sharing Thank DaddelZeit for sharing it
This is a rather large compressed file to have someone looking into it, which I would seldom do. This time I went for an exception to find a lot of files that don't belong in a mod. First off, there are several desktop configuration files in your mod, I wonder why. Then I see several OBJ files and their corresponding MTL files, they have no function in a BeamNG mod and are therefore also a waste of data. Then when quickly looking into the files that should be there I see a lot of mixed up stuff with weird namings and lacking efficient code. I suggest that you take an original vehicle from the game and try to take the transmission out of it. Then you might be able to learn how to make a transmission working. I don't mean to be criticizing but making a good working mod for this game is VERY difficult. You are not helping yourself by creating random code and files. It is very important to respect the structure of the original method and to deviate as little as possible. That is the only way to keep track of all the details that are essential to make something working properly. Try to start with making small and subtle changes and see if they take effect. Then move on to bigger steps.