I am having issues with my 2003 F150 4.6L truck. It just happened today when driving home. It started fine and then when I increased the speed and the rpms went up to about 2000rpms, the engine seemed to slip into neutral. I stepped on the gas but the truck would not accelerate, it was just coasting. I pulled over to the side of the road and came to a stop, but didn't shut off the engine. After a few seconds, I proceeded to give it some gas, and it engaged in gear and accelerated...until I got to about 25mph & rpms increased to about 2000 again. It did the same exact thing....seemed to shift back to neutral so that I could not accelerate. I had to keep pulling over to come to a stop, and then slowly proceed again. Thank goodness I wasn't too far from home & I made it. Does anyone have any thoughts on what this issue could be? I would greatly appreciate it!!

 

I assume you have check the oil level in the transmission?

 

Just checked it, and the level is fine.

 

Hello, Old fashioned me would look to something which controls the shift into third gear. Maybe there's a disconnected vacuum line or unplugged controller of sorts. If the filter is clogged fluid starvation may be causing these symptoms. Kira

 

Thanks for your advice, Kira. I will relay the info to my husband. I really appreciate it.