I have a 2002 ford f-150 5.4 4x4 the tranny (i thought)went out on me but I let it set for a few minutes and it drove normal for about an 8th of a mile and went out again so it's just sitting behind my house and I go out and drive it one a week and it seems as soon as the fluid heats up it goes out again until it cools off then drives till warm again and so forth so does anyone know if it's my tranny or maybe a coolant or vacuum pressure I'm not a transmission expert by any means so if anyone has an idea please let me know thanks

 

It isn't coolant or vacuum. Neither of those affect the transmission going into gear.

Is the fluid level correct? You need to check it with the transmission warmed up and the engine idling in park. IS the fluid red, brown, or black?

 

Okay I will check and get back to you does it sound to be messed up to you?

 

Fluid level is good fluid color is brown/ dark brown

 

^^^burnt^^^^^

 

It's done. Stick a fork in it.

You need to rebuild or replace the transmission.