The retination does not work

Hello, I have an automatic Ford Explorer year 97 4x4 Motor 4.0. Benchinera My problem is as follows:
Changes P, N, D, D1, D2 work perfectly, Péro when passing the setback does not work. The light of the O/D blinks intermittently on the board when putting the change R. This began to happen after days I put the 4x4 march in a setback (it moved like a meter) and then the reverse no longer worked.
If they can help me or guide me about what the fault could be, I would appreciate them very much.

Sincerely

It sounds to me you have spoiled the body of vavules you will have to take it to a specialist in automatic transmissions, it has to be someone competent is not easy to repair automatic boxes.

Good evening,
the same happened to me a few months ago and the problem is that the 4x4 pine nuts are wearing the automatic transmission, the problem is that then stop hooking the rest of the speeds; You can do a test, try to reverse with 4x4 in low, surely hook in that state. You must be careful because that can generate serious damage in the automatic box