- the sound is taken from another f-350 mod, i'm not from USA and i don't know how those pickups sounds, so there might be some differences, but to say it is garbage is too much.
- the texture don't glitch or flicker for me, if it is happening for you it is either because of your graphics settings or because you use the mod in mp
- the dually wheels are for the flatbed and service bed. There is good enough description of the mod + all the pics, so before buying take a look at the mod pics and descriptions.