I have been chaseing my tail with this! i have a 2002 ram 1500 360 5.9....4inch lift 35s. if i am at highway speed and hit a slight hill, i start to lose speed so i press the gas to speed up but nothing happends till i press the gas far enough for it to kick down! i did a back pressure test it read a 0 , no vacuum leaks,trans is just fine acording to the trans shop here!
ive replaced TPS map sensor, and plugs .wires.....no codes i need sum advice! my gas milage is 1-3 in city 6-10 highway HELLPPPPPPP!!!!!!


THANX