Mercedes Arocs SLT 8x8 truck in Lego technic

[crazy technic]

my first post here,

This is my oldest moc and I finaly finished it,

this Moc is based on the Mercedes Arocs slt 4163 8x8, this is the strongest truck Mercedes makes and it can pull up to 250 tons.

my moc uses 3 large EV3 motors for the driving and one medium EV3 motor for the steering.

one of the most difficult functions to build were the differential locks, IT HAS 7 !! (that's one on every axle and also between them)

I managed to get some pictures of it next to the real truck.

 

and I just posted a Youtube video about it too.

 

[Auroralampinen]

Well why the video is private? Anyway great moc and great to see it next to the real truck:) 

[crazy technic]

15 minutes ago, Auroralampinen said:

Well why the video is private? Anyway great moc and great to see it next to the real truck:) 

It's sceduled for tommorrow at 10am, but I didn't know the link wouldn't work anymore because when I made the post it was only accessable thru the link.

[2GodBDGlory]

Wow, seven differential locks! Would the real truck actually have three extra differentials in the chassis?

Was there any particular reason you chose to use EV3 motors? Was it just what you had available? They're definitely fairly challenging to integrate into models!

[crazy technic]

2 hours ago, 2GodBDGlory said:

Wow, seven differential locks! Would the real truck actually have three extra differentials in the chassis?

Was there any particular reason you chose to use EV3 motors? Was it just what you had available? They're definitely fairly challenging to integrate into models!

I'm pretty sure it has 7,I found it on the Mercedes website, I don't exactly remember but I think the only 8x8 configuration was like that.

Yes, until a couple of weeks ago I didn't have any other motors than my two mindstorms EV3 sets, they also have a lot of torque which makes them great for things like this, and I have the rechargable battery pack for the EV3 so that also makes it easyer than AA batterys.

[2GodBDGlory]

That makes sense! When I started out with Technic, I mostly had access to Mindstorms NXT motors, so I built quite a bit of stuff with those. It was challenging to make space for them, but it's what I had!

[crazy technic]

2 minutes ago, 2GodBDGlory said:

That makes sense! When I started out with Technic, I mostly had access to Mindstorms NXT motors, so I built quite a bit of stuff with those. It was challenging to make space for them, but it's what I had!

yeah, it can be difficuld at times, it was one of my first large technic sets, so I build a lot of mocs with it, recently I got the liebherr9800 so now I also have PU to work with but batterys is a problem there because I like rechargable ones but they have less power.

[M_longer]

Looks cool, especially with real one in the background. Yet your model looks like it's off with proportions of the cab. Do you have more side/front pictures?

[Timewhatistime]

"The most powerful truck ever made in Lego Technic" ...? Seems more likely to be the most random record claim in Lego Technic...

[crazy technic]

4 hours ago, M_longer said:

Looks cool, especially with real one in the background. Yet your model looks like it's off with proportions of the cab. Do you have more side/front pictures?

I don't see what looks off so much to you, but I do have more pictures.

[Paul B Technic]

That is very cool.

[crazy technic]

10 hours ago, Paul B Technic said:

That is very cool.

Thanks, I appreciate that

[bonox]

excellent seeing models made with mindstorms motors. 

[crazy technic]

On 11/9/2025 at 7:51 PM, bonox said:

excellent seeing models made with mindstorms motors. 

I have since bougth controll + sets, and I must say the compact form factor is much better for most mocs, at the time they where the only thing I had, and also they way my lego technic journey started:

on my 10th birthday i got my first mindstorms ev3 set, after i build a couple of the models I imediatly started modifing and motorising everything, probably my first succesfull project was moterisation of the 9395 pickup tow truck, i unfortunatly don't have any footage of it, many other projects followed, during the pandemic I discovered gearboxes ( I was 11), I learned a lot about them, build many tutorials from youtube, and this project of building a truck started not long after, first it waqs just a 4x 4 truck, then 6x6, then 8x8, eventualy i stumbled upon this model and after rebuilding the chassis like 10 more times we arrived here

[icekusbe]

Wow! 8x8 live axle configuration for RC truck is already challenging to pull of, but you topped it with locking differentials. Respect 

Also the truck looks very good.

[crazy technic]

8 minutes ago, icekusbe said:

Wow! 8x8 live axle configuration for RC truck is already challenging to pull of, but you topped it with locking differentials. Respect 

Also the truck looks very good.

Thanks, the front grill and  bumper are actualy a collab with a friend, I did all the mechanical madness inside, and I am personally responsible for every overengeneered part in this truck