Stutter/Vibration & Loss of Power While Downshift on Highway
Truck: 2009 F-250 FX4, Crew Cab, Long Bed, 6.4L (32,500 miles)
Last night on the freeway I was climbing a slight grade going about 70 mph. I put my foot a little more into the pedal to pass the car in front of me. The truck started to down shift but then started to stutter (like little very quick vibrations) and the motor reved up but the truck didnt really speed up. I let off the accelerator and the truck calmed down and everything was fine. No service light came on. (Truck continued to "vibrate" until I let off the pedal)
It did this twice last night on a 300 mile drive, and it did it a few weeks ago on a long drive. One additional note, it was raining last night while I was driving, and I BELIEVE it may have been raining a couple of weeks ago when it last did this same thing. That being said, I do not think its a tire traction issue...I made sure my tires were all on pavement (not on road striping) when it did it the second time last night.