I think you've explained before that the pushback tug wheel LOD logic is actually handled in the Python scripts? Therefore, is it correct to assume the same LOD logic/code is used on all the same tugs at all the FSDT airports where used?
Never said that. LOD for vehicles is never implemented by the Python scripts, not even in GSX vehicles, but it's plain standard FSX LOD and these are not even vehicles handled by Couatl/Python, they are ground Simobjects running over a path, and are handled by the Addon Manager, which jus creates the object and assign it to a patch, it doesn't do anything related to LOD handling.
To adjust LOD levels, would require recompiling the .MDL itself, we might do it in an update. If you can't wait, you might probably do it yourself with the ModelConvertX program, which has a LOD adjust feature.
Check also your SmallPartsRejectRadius parameter. If it's set higher than the default of 1, it might cut pieces of objects like wheels, for example.