After the fantastic I Technic Weekend I learned a couple of things of the participants (Thanks to all, especially to Sheepo!). I decided to modify the trial truck that had brought. With the advice they gave me I picked up the bottom of the off road for not having problems with rocks under the bottom. In this photo you can see the new bottom:
I also included an openable hood and trunk, where they enter two power functions remote controls.
On the technical side I am very proud of the rear axle. It doesn´t give me many problems and is as wide as the front. Besides, it is very compact: The gears do not have room to slipping.
Sorry about photo quality: when I can I´ll upload another.
I wont complain about the front axle. For traction it uses the same system as the rear axle, and the direction is somewhat more complex. I am less proud of the direction.
Even so in the I Technic Weekend competition it had my best participation of one of my trials at any time. (Sheepo knows this!)
One last photo:
The suspension is very effective. It only has some shock absorbers on the rear axle, so that the front has a lot of freedom. The shock absorvers are soft. There are 4.
Finally the video:
I hope you like it!