Lego Technic 42078 Mack Anthem test RC mod images

I made my first quick proof of concept rc mod of the Lego Technic 42078 Mack Anthem truck to see which motors fit and how in the chassis using some spare parts I had. I did not plan to release any instructions or images about it as it was just a test and I will do a proper RC mod sometimes in the future.

Since I received tons of requests to provide information about that mod despite its rudimentary approach, I decided to share the images here what I took during the disassembly. Please note these are not instructions, I only have these images as the model is rebuilt into the Garbage Truck now. Please don’t ask for more information or further instructions, this is just a little help for you to see how I did it and it can be used as a help or starting point for your own RC mod.





  1. Hi, I really like your RC Update for the MACK Anthem an I would like to upgrade my one. Is it possible to get a List of required parts for this upgrade. I haven’t found a link to a website where to buy your changing and part list. I am looking forward to your response. Thanks for sharing your expertise. Best regards Heiko

    • Hi! I’m not sure if your read what I wrote in this post? I understand what you are looking for but I don’t have it unfortunately. Maybe in the future if I’ll have time I’ll do a proper RC mod with instructions but that’s a huge effort and takes a lot of time.

  2. I was looking at your pics of where and how you did the motors. But I didn’t see where you put the battery pack at. Can you tell me where the battery pack is located at?

  3. Hi Racingbrick

    Hope you well,

    Your MOD is exceptionally good and well thought of, i have this set myself and i myself would love to know what is required to achieve this, however, I do not understand why you are so rude and reluctant with regards to sharing the requirements\parts list required to accomplish this MOD

    Yes i do understand it is time consuming and a lot of effort, but in the same breath why post or share this MOD without being receiving to questions from your fans\followers on how to go about achieving this MOD

    • Hi Kreshen,

      Thank you for your kind words, let me try to explain why I am “so rude and reluctant”. Modding this set took me around 2 days altogether. The single purpose of this mod was to see what motors can drive the truck and the trailer and whether these motors fit in place. This is not a well designed nor well prepared mod, just a test for fun. Please allow me the freedom to decide whether I’d like to share images or videos about any of my creations regardless the fact that I’m planning to share instructions for it or not.

      A lot of people who create Lego mods/mocs do not share instructions at all, simply because they would like to spend their precious time with the creation/building part. I’m not sure if you ever tried it, but believe me it takes much-much more time to create proper building instructions than to do the mod/moc itself, even for smaller builds. This set has more than 400 pages of instructions originally, can you imagine the effort needed to properly update all of it and include the steps for such mod? I’m doing the motorization in a freestyle way, simply partially disassembling the vehicle and testing what/where/how fits by adding and replacing parts. To create any kind of instructions I’d need to separate the original pieces from the ones I’ve added (we’re talking about 2500+ pieces don’t forget), taking pictures of every single step of the disassembly or comparing those to the original building instructions and highlighting all differences/replacements.

      Hopefully now you understand that creating a mod and providing instructions for it is nowhere near “doing it the same breath”. I think I was kind enough to document the disassembly process with the images you see above to give some hints to anyone trying to achieve a similar mod. I did create instructions for some of my previous creations and I’m also planning to do in the future, but I’m expecting you to understand the effort needed for the things you’re asking for and to observe it rationally.

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