Stuttering

My vehicle is starting to stutter like it is going over speed strips. I have changed the throttle body and relearned it and I still have the same problem. But it does not act up at all until it gets warmed up then the lighting bolt light comes on and it like goes in limp mode. The only thing I have not checked yet is to see if the transmission fluid is burnt or milky. If I find out before someone answers I will let you know what the problem is or was.