[MightyWhitey]

My 6.4 auto is starting to act weird. Every once in a while, while slowing to make a turn with foot off pedal for a second or two, then foot back on its like the truck forgets its in gear for second or two then BAM (abruptly) it engages and acts like nothing happened. Truck has 90k on it, been treated right with proper maint. Filter and fluid changed out 15k ago and never over 190 degrees on trans temp gauge. Wondering if it could be accelerator pedal sensor or is more likely to be a shift solenoid since it only happens when going around 10-15 mph with inititial acceleration after deaccelerating? Anyone else see or hear of this? Also, if it is the pedal sensor,, why is it I can only find them for fixed pedals. I have the adjustable pedals.... Help please....

 

[MightyWhitey]

Nobody?????

 

[Mark Kovalsky]

I think the only way to find out what's happening is to get a high end scan tool that can look at live data. With that you can see what's happening in real time.

 

[davang55]

I have a similar issue on my 450. foot on brake slowing down in tow haul, about 10 mph the engine speed starts to surge with my foot on the brake! truck wants to keep going.