Hello, I have a 08 automatic mustang that when I shift it into the drive on reverse, it acts like it is slipping and will not go anywhere, maybe a foot or so forward and backwards. BUT when I put it into the 1, 2 or 3, gear position it takes off without hesitation and is not slipping at all. Have any of you ran into this before? Any suggestions. I feel like its a solenoid or something. just not sure what to replace.