My agency operates 7d vehicles that transport young children. the seats in which we must place rear-facing infant car seats do not allow us to properly secure the car seat. there is one tether installed on the back of the seat and 2 installed where the cushions meet. the strap that is supposed to clip to the tether on the back of the seat is too short for rear facing car seats. the car seat can be secured using the side tethers, but the inability to secure to the rear tether results in the car seat moving forward & backward. if there were a front-on collision, the infant's head would thrust forward. i am not sure if this is a problem with the vehicle design or the car seat. (related vehicle information: model year=2008, make=ford, model=econovan e150). *tr