Over Drive button

Hello again I am working on a 2002 Ford Explorer and I have the problem that when I accelerate the truck a lot, the light of the Over Drive is turned on and forza the speed changes already changed a couple of censors that I also needed but I have no idea how

Greetings friend, first of all you have to scan the TCM (transmission control module), if it enters safe way it is because there is an internal failure that can be electric (some sensor), mechanics (some gear or worn piece) and hydraulic (a low or high pressure of the oil), the TCM is able to detect even if the box is "sliding" (the engine is accelerated but the displacement is little). With the fault code it can be investigated that it is wrong and proceed to diagnose and solve the problem.

Ok I understand a fact that I forget to measure in the previous mesage was that when I went to the engine, I got a problem with the solenoid valve and the solenoid those I already changed them and another friend told me that perhaps that solves the problem since everything is related to the transmission but the truck does not have a plate and therefore I have not been able to handle it to check if the problem is solved but I have the problem. TCM and Schest

Greetings, I understand that there is scanner for both ECU (motor), airbag (abs) and TCM (box), I think the explorer uses the same ECU connector, what is there is that the TCM support scanner for it, with respect to the button, the light indicator indicates the failure of the box, not necessarily on Overdrive box (checktrans).

Ok umm I am a little more confused the light only indicates o/d off ahh mention that they change the solenoid valve and the solenoid does that have something to do with my problem? In any case I will continue working in the truck I will take you to scan once more thanks for your help and greetings