I see that you're new here. Let me advise you on some guidelines on the forums. Read the last couple of pages of the thread you are going to reply to before you make your reply on it. This prevents cases such as me needing to tell people 20 times a week on the same subject that this mod is outdated. So, please, don't be that guy. The answer to your question is above your reply.
FWIW, the hubs on the Twin Traction Beam suspension break upon spawning, thus you have no 4wd. Clicking on them does not change their state. I'm aware the mod is out of date, but figured this problem is obscure enough that I should let it be known in the event that it is eventually updated.
AR162B updated Gavril D-Series addon by AR162b with a new update entry: Fixes Read the rest of this update entry...
Not sure of the contents of the DFA pack, but everything should have it's own unique name or textures. That's weird, I gave them a new, unique materials name and added it to the materials file list. Anyone else having this issue as well? That one is not maintained from v0.8.0 due to the amount of work necessary needed to get it up-to-date. It is still in there for legacy reasons but has no config file e.g. Should be fixed the materials (and mapping) changed to current D-series/Gavril material. Thanks