Blazer with problems in the box

Greetings to all

good the matter is as follows. I have a Blazer year 97 automatic with problem in the box. The probla is that it has no strength and only walks in third and throws me 4 codes
q are from the solenoid

-p0740 = Comverter d par
-p0753 = change of ectromagnetic speed a.
-P0785 = Speed ​​change change Synchronization
Dysfunction
-P1860 = TCC PWM Solenoid Circuit Electrical

those codes da and the medium and all were bn and I do not know more to be able to make it if someone has any idea or save that it can be fabor to respond or other evidence devote

to hand thanks thanks thanks