Automatic box

Who could help me with the following problem ... I have a 2003 automatic box Dodge and from Ase little does not give back it for more than it does not go back and in forward everything normal throws the changes well ... and changed the oil and the filter, and the sensors are rebuilt but still the same ..... Any idea of ​​how I repair ?????? Grasias in advance !!!!

Hi, friend! Well, surely you will not be able to correct your problem with the change of oil, filter or anything that has to do with the electronics of the box. The safest thing is that you have to lower it and repair it completely so that the expense is worth it. And I think the problem is in a league or piston (of transmission, of course), in the case of your fault is the reverse clutch. Or it is also possible that the failure is the reverse band. Anyway you will have to lower the transmission. Greetings and oh warn us what happened. It goes.

Brois wanted to save me from lowering her hehehe but I will try to check the "Shift Solenoid" and warn them .... greets from Honduras ..... !!!!