What is :-
the tongue of the motor
?
was about from 15 to 30 celcius and i don't think that was a fail test because Itested in diferent ways
If a 2n3055 transistor did not get mad jumping hot with 5A flowing through it something is very wrong. You might think you have done a test but those results simply do not make sense. You should have nearly 5W of energy to burn off as heat, because you did not then I suspect you did not test it at 5A and so your tests do not show what you think they show.
Still if you will not give details of the test you did it is hard to say where you are going wrong, but wrong you are going somewhere. I suspect you did not test it at anything like 5A.