yea, i didnt think the throttle cable would have anything to do with it.
the trans isnt original. it was a /6 car and i swapped in a 360 and 727. the trans is out of a 73 challenger.
when im cruising in third and i hammer it, it doesnt want to kickdown. i rebuilt the trans a few months ago and only has a few miles on it. otherwise it shifts fine. just doesnt ever want to kickdown
when i open the throttle by hand, i can still push the throttle pressure linkage down about 5/16.