Hello everyone i have a question, serious question now i know nothing about vehicles as far as exuast and tire size. But what i want to ask is what is causing my 2007 ford f150 4.6l to rev up while in drive while im just costing. see i was at about 20-30 miles perhour and almost to 2 rmp and repeatedly my truck would rev in the range of 20 to 30 miles per hour for about 1 seconds but would go back to normal after that rev please help i love my truck to pieces please someone i really appreciate it if yall could help i rely on my truck for work and also while I was in Park at a target parking lot my truck began to rev up Wow and park I don't know what is causing this but if anyone has any suggestions are opinions please list them down in the down below I really appreciate your help thank you and have a nice day

 

This occasionally happens in the 2007 I'm driving as well. 5.4 liter.

It's like the transmission slips into neutral briefly, then slips back into gear. Happens when under very light throttle.

 

So what did you do to fix the problem that you were having

 

Haven't done anything. It still happens from time to time. As soon as it happens, it's over. Might happen once a week or so, and never more than once on a given day that I can recall.

Just bumping your thread in case someone else might know what the issue could be.

I don't know about yours but mine doesn't illuminate the check engine light or anything else like that when it happens. I do get a flashing overdrive light/message on odometer screen saying 'trans fault' when creeping in traffic on a hot day for extended periods of time, though. That has happened three times. I shut the truck off and restarted and it went away. Gotta get the powertrain codes checked by Ford for that one.