Weight Pad Going Through The Ground

So i've recently managed to make a shy heavy challenger and while i tried to put it on the weight pad i noticed that it was heavy enough to make the damn thing go through the floor and the car managed to slowly crush it! and so i was wondering: is there any mod that manipulates this or is there a way to put it on the air and literally freeze it? and yes i have tried lifting it but for some reason even with 100% strength i am unable to move this thing. any help would be greatly appreciated.

Note: mod is private and i found it through another thread