Gahh, 30 minute time limit for edits.
The other medium trucks do have issues as well, the
2WD truck could be included as a heavy truck without A/T capabilities.
ZIL 6x6 is missing the A/T capability, I suspect Volvo truck was as well an A/T truck. FDF relied on confiscating civilian trucks in case of conflict, so generic civilian trucks could be added.