Automatic transmission problem

Hello colleagues, I have a 1993 TD27 Nissan Mistral, the problem is that the first march is stuck and when a strong shake is stuck, it is only in the first, the strange thing that that phenomenon passes by high speed and not in descent. The oil level is ok, the inner filter is ok, apparently it is a solenoid that is being stuck Well, you abe the clip does not feel and therefore sticks, to solve it, the contact is cut when you stick and pass it without any problem. PLEASE someone who can guide me with the problem.
Atte.
Carlos, La Serena.

Hi Toroca, look at the hydraulic system there is a basis size of an orange inside it has a member if it is broken member that probes that, you cannot repair it you just have to change for another, or you fail you clutch disc.