i have a 4 cyl 2007/autp/access cab/sr5. I have a very annoying cruise control problem. Here in savannah everything works great, no problems. But when i drive to ohio like i do 6-7 times a year, in the hills of va and west va, holly crap. The cruise is about useless, lets say that i have it set at 65, the truck is in 4th gear overdrive, commin up on the hill when it starts i can hear the engine starting to strain to hold the speed, the engine gets louder i see the trans come out of over drive for a split second and stright to 3rd it goes, we race up the hill from 59-60ish to 70 or more, now in the middle of the hill, the truck shifts to 4th right into oever drive and we start all over. God forbid i am in second gears speed range cause it will downshift to 2nd overshoot the speed and right back to 4th in overdrive to start the cycle again. I took it the stealership and they drove it five miles and said could not duplicate fault, knowing full well that i told them that the hills need to be larger than we have here, there arn't any hills here that will even take the truck out of od.
So are there any other 4cy guys out there that have experianced this, got it fixed? or learned to live with it.