Truck loses power

[ddkrueger]

I have a 2011 F-450. While driving at highway speeds all of a sudden I will feel a sudden jerk as if I took my foot off the accelerator even though the engine is still running. The truck slows down and acts as if the transmission has disengaged. When I put the truck in neutral, turn off the ignition and restart, everything works ok until it happens again. Does not seem to matter if I'm using cruise or not, or whether I'm pulling or not. When I'm traveling on the interstate and this happens, it gets a little scary.

 

[01yellerCobra]

Are the rpms climbing or dropping when this happens?

 

[BIG JOE]

Ford needs to know about this. Have it Scanned.. to see what's going on here.

Joe

 

[ddkrueger]

The rpms are climbing somewhat.

 

[01yellerCobra]

I'm wondering if it's something in the trans disconnecting.

 

[WD40]

I don't know whats doing this but it was talked about on one of the RV Forum's I am on and Ford does know about it but nothing has been done about it yet.
Doug

 

[stephen.crews]

I am having the same problem with my 2015 F250. Usually happens going up an incline around 50-55 mph. Truck will lose power and start shuddering. Ford keeps saying that they cannot duplicate the problem.

 

[bytor]

The description of shuddering would describe what I have experienced. But I have a 6.4. I’ve replicated it several times. If I’ve slowed to about 45mph and the torque converter is still engaged and its still in 5th gear, if I then accelerated slightly/moderately and stay in 5th, that engine will sputter and the whole truck will start to jerk. This only happens while in 5th. If at that speed and it shifts to 4th, I’m fine. At that slow speed in 5th gear, the rpms are probably under 1300 and I wonder if that ECU/transmission just are not well coded for that combination.