And so...
After I had all my car split into peaces, I did a quick search to see how the transformers are actually transformed....
*probably I could have done this research even before I split the car....

Anyway after I decide how should my car transform (this I mean how roughly my transform will be in@the robot shape) I started to put all those splited part in the position of the robot.
*remember to save in different file so you can use a old file (car model file) to use as reference when you going to make it transform back to a car.

And when I got satisfied with the position I started making the interior and the skeleton.