the reason why you hear sound: The mod file is in your regular 1942 folder, NOT a server or "true testing environment", like I posted in my reply. Server-side you cannot change sound, textures, etc etc.
DO THIS and you will have "NO SOUND TURBO JEEP":
1) COPY your 'Battlefield 1942' folder.
2) PASTE it somewhere. Call it 'Battlefield 1942 2' or something. The name does not matter.
3) PUT your mods in the copy of 1942 folder.
4) RUN dedicated server of copied 1942.
5) JOIN that server from your regular 1942.
