Im having major problems with my 2004 f250 6.0!! When i went to start it it would barely start then once it was running and warmed up i tried to put it in gear and it would not rev up or move in drive or reverse.. But it would rev up in park and neutral.. Also before it started doing this, while i was driving sometimes it would drop into a lower gear and rev way up when it did this i would let off the gas and it would slam/jump into gear... what could cause these problems?!!!