I guess he's doing a meshslap and asking how to move the rear wheels of the car backwards to match the wheelbase of the model
Why are you so rude? He need help. I think you have to edit "yourcarname.dae' in blender and move the rear wheels backwards. I did it to my automation car, and it worked, so I think it will help you. If it won't work you can move them in BNEditor.