WHEN I SHIFT FROM REVERSE TO DRIVE THERE IS A 2 SECOND DELAY AND AT TIMES I CAN STILL BE ROLLING BACK AN ADDITIONAL 2-3 FT. ALSO MY VEHICLE WILL ACCELERATE W/O ME TOUCHING THE GAS. I HAVE TO HIT THE BRAKES AND AT TIMES THIS WILL NOT WORK. I WAS INVOLVED IN AN ACCIDENT WHEN I BRAKED AND MY JETTE ACCELERATED INTO THE BACK OF ANOTHER VEHICLE. PLEASE HELP.