Hi Guy’s,
I have hit a wall and looking for some help please, I’m the original owner of a 2003 Ford F150 Super Crew w/ 5.4 & 4R70W transmission & 4x4 with 70,000 original miles and that has been running like a clock until a couple days’ ago. I was coming up-to an intersection and when I started to apply the brakes the truck begin to shutter and stalled! The truck will restart in park & neutral and will idle & RPM without hesitation, but when it’s put into any gear it stalls instantly every time! If I put the truck on jack stands it will go into gear and run until I apply the brakes and then it shutters & stalls. The truck will not trip any DTC regardless how times I try. I did some homework and it had the symptoms of a failed TCC solenoid, so I replaced TCC solenoid & wiring harness witch didn’t resolve the problem. If anyone has encountered this problem or just has a good recommendation, my baby and I would greatly appreciate it! Thanx Mike

 

Have you checked your fuel pressure? Check for vacuum leaks... particularly the PCV elbow going to the back of the throttle body.

 

Thank you for the awesome lead's on where to pursue the fault & I will do so this weekend and let you know how it turns out. Thanks again Mike

 

my 2004 is doing the same thing goona have to check that out as well

 

No problem, let us know.

 

I wan't thank you guy's for the great advice,

I couldn't believe it was a shorted relay for the PCM in fuse block under the hood. I swapped the relay's in the fuse block and heard a loud click that came from the transmission, and I fired-up truck and everything was back to normal and she run's like new! Thanks again Mikee

 

Glad you figured it out. That would not of been my first thought.

 

which relay was it exactly?