Old, staying for reference [Tatra 813 6×6 V2, Instructions.]
My second version of the Tatra 6×6 trial truck. It now has a 2 speed gearbox and better adjusted shocks.
UPDATE: Instructions can be found in the Instructions page above.
When I finished building the V1 of this truck I stopped and thought, this truck could use a gearbox, and there is almost enough space for building one, so why not? So I took the whole structure of the rear axle 1 stud back and sticked a gearbox where the motors sit. The gearbox works this way: The motor drives a pin with 2 gears on in front of the other, when the motor and the pin are being moved forward one of the gears is meshed with his set of gears (gear 1) and when it is being moving backwards the opposite happens (gear 2). The gearbox is duplicated on both sides of the truck: 
The gearbox is operated by 2 pf M motors driving a worm gear on a 24t gear. The have alot of power and precision.
————-I guess that from here on there will be nothing really new—————-
Specifications:
- 2 XL motors for drive
- 6×6 drive
- 4×6 steering
- M motor for steering
- 2 speeds gearbox
- Headlights
- 2 battery boxes
- Functional steering wheel
You can see even more about the V1 (which many things in it are similar to the V2) HERE.
Video:
And some more photos:
Yorai 
Can you give some tips on 1st double steering and 2nd tips on building a tatra i dont care if its a 4×4 6×6 or 8×8
Sure, but do you have any specific questions?
Whats harder to build 8×8 or 6×6 tatra
Well, it depends. Sometimes 6×6 can be harder because you need to squeeze all the mechanisms into a tight place. But 8×8 is heavier and needs to be stiffer. I use to say 8×8 is just a 6×6 with an extension 🙂
yea i can only make 6x6s because only 6 wheels but i made your first pf 6×6 and made it longer
Really? That’s great! Maybe you could upload some pictures or a video so I can see how it works?
Yeah, ill try man and your an amzing builder but on your 6×6 did you have trouble with the back suspension my doesnt squish the spring like on the 4 front ones
Thanks! I had no problems with the back suspension.
Oh do you know sariel
Of course! A great builder!
Yeah, but sometimes kinda a jerk on his website
P.S. I think your a better builder 9dont tell him that. 😉
🙂
Yeah you are his new humvee is amazing but you should make something way better like a 8×8 maz of ginaf
What do you mean by better adjusted shocks?
I mean I changed the spacing between the half-axle and the chassis so it the suspension will work better.
What cant you do i mean come on your a perfect builder