@ SeriousKnowledge, I see your chassis L0 is aligned with chassis dummy. but you need chassis L1 and L2 to be aligned too. Your bumper_f_L0 and L1 should be aligned with dummy bumper_f and so on.
Your wheel setup should retain GTA5 setup, not the well-known GTA4 setup. you don't need "wheelmesh" stuff anymore. you need your [wheel_lf] to be in braces and contain high-detailed mesh as L0 component inside and low-detail wheel model as L1 inside. technically, you can leave [wheel_lf] and the only it's child wheel_lf [COL]. anything else could be deleted.
note, you have to replace both model.yft and model_hi.yft on export. preferable, export them from the same scene (if you have multiple lods like L0, L1, give a name of top root item as model_hi and export the same scene into model_hi and model.yft files. Just set "LODs" mode to "Autodetect", ZModeler will do the rest properly -> L0 will go to model_hi.yft file and L1 will go to model.yft file).