Dieseldude4x4

50 to 55 mph in 5th gear under light load, it stumbles and bucks and clunks till you think it is going to shut off. Reach down and turn the cruise control on at 55 mph and take your foot off the go fast pedal and it is rock solid, no stumbles, no bucks or clunks. Now, what does cruise control do that the go fast pedal doesn't? Goes to the same lever on the APPS that the foot pedal cable goes to.

Also has a slight hesitating type miss under heavy acceleration at higher rpm's.

rebal

to me it sounds like your apps with cc on ECM does the driving

RAM2940

Doesnt the crank or cam position sensors have some effect on cruise control. Is all that done through the ecm.

Dieseldude4x4

I ordered a crank sensor back when I replaced the MAP and IAT. Just have not gotten around to replacing it yet. The other two finally got rid of the derate I was experiencing which was driving me up the wall.