Hi Black Nova !
I am using the T_car scripts for my racing game. The wheel offset is definded in four variables, you can find them easily in the car or physic scripts. Maybe the offset of the wheels to the car chassis is too short or wrong in other ways.
Another reason for your probs could be a flawed position for your front wheels in MED. Try to change the position in MED and see what happens.
Hope that helps !