I have a 2000 F150 5.4. It runs fine in P or N when you put it in D or R it bogs out and dies. There are no codes. I have replaced AIC, TPS, Cam sensor and the gear selection switch on the tranny. Nothing has worked. I need any advice I can get. Is there maybe a Torque cnverter lockup switch that could be bad. If put it in D and press the gas fast it will drive. It studders at first and then smotths out. If I come to a stop with out putting it in N it will die. Any advice will be greatly appreciated.

 

Obviosly (but I will still point out) there is no load on the trans in P and N. I'd say a torque converter is a good place to start

 

Is there a switch or a selinoid that locks up the converter? or do you have to just replace the torque converter?

 

I don't pretend to know jack about trannies internal workings, and in this case, I don't know jack!