Got myself a 2003 F250 with a 5.4 two months ago and every now and again it will stall when I shift into reverse. I tried to make it happen and I did notice a big rpm drop when I shift to reverse sometimes. Not sure If that has anything to do with it. Clueless about this. Any suggestions will be appreciated.

Thank You
Chris

 

Low transmission fluid can cause this. Check it with the trans warmed up, in park, engine idling.