just got a new engine in my truck and everytime i go into reverse it starts to make a rattling noise, has stalled twice when i just let it run for a few seconds with the rattling noise, easiest way to describe it is someone putting a stick into the fan. anyone had this problem? hoping its just a seal that wasnt connected right when they swapped the engine. any information would help
10k on new engine
170k on trans
07 f150 5.4L