Mitsubishi Fuso House Truck Build

Amk22

New member
I am new to the site, and recently purchased a 2003 Mitsubishi Fuso FG 649. I am trying to build a tiny house on the back of it, and looking into a steel welded, or bolted aluminum frame. Wondering if anyone has experience or suggestions for which one to choose. thank you

truck-cab-open.jpg
 

SkiFreak

Crazy Person
A steel subframe is probably easy to build and will normally resist cracking/fatigue better than an aluminium subframe.
There are numerous threads in this forum about subframe mounting systems. Choosing which one to use is a personal preference but I would suggest a spring mount system, as these have been proven to be fit for purpose.
Welcome, by the way. :)
 

Amk22

New member
Thank you for the responses so far. So the issues I am running into now are, what materials to use and how to mount it to the chassis. Have people build subframes, and if so, do you weld it or bolt it? We are taking this off roading as many of you are, so want to make sure the structure isn't going to crack with all of the moving/bouncing happening. I am really having trouble connecting with builders and fabricators around this as no one has done anything like this before. Hoping this community can provide me with some of the answers I need. Thank you so much!
 

Amk22

New member
A Body Builders guide can be found here; http://www.mitfuso.com/mitsubishi-fuso/Resources/Literature

How do you find the ride, driving without a load on the back?

__

We drove it from BC back to Portland, about 8 hours, without a load..it was..interesting :) My partner drove it, and said it drove like a tractor, he loved it. I found it a little bumpy, a little hard to change the song on the ipod, but got used to it and it wasn't bad. Speed bumps in the city..that was a different story!
 

Victorian

Approved Vendor : Total Composites
__

We drove it from BC back to Portland, about 8 hours, without a load..it was..interesting :) My partner drove it, and said it drove like a tractor, he loved it. I found it a little bumpy, a little hard to change the song on the ipod, but got used to it and it wasn't bad. Speed bumps in the city..that was a different story!

A friend of mine upgraded his suspension as he could not sit down while driving off road. The original suspension is horrible.
 

SkiFreak

Crazy Person
Hoping this community can provide me with some of the answers I need. Thank you so much!

I do not want to be rude, but have you searched this forum for answers to your questions?
I am pretty sure that everything you are asking about has been covered in detail already.

Questions like "what type of material should I build the subframe from" really comes down to what you want to do with the camper and how much money you want to spend. As I mentioned previously, working with steel is normally easier than working with aluminium. How to mount the subframe to the chassis is also a subject that has been discussed here many times. I will agree with you that the majority of body builders know very little about mounting a subframe for an off road scenario. Many that I have been told about say they have been mounting truck bodies for years and that they know what they are doing, but I would argue that their skill sets and experience are normally based around vehicles that travel primarily on the highway, not on uneven terrain.

A solution might be to design the subframe yourself, from information you find here, and then get a fabricator to make it, assuming that you are not planning to build it yourself.
 

Amk22

New member
I do not want to be rude, but have you searched this forum for answers to your questions?
I am pretty sure that everything you are asking about has been covered in detail already.

Questions like "what type of material should I build the subframe from" really comes down to what you want to do with the camper and how much money you want to spend. As I mentioned previously, working with steel is normally easier than working with aluminium. How to mount the subframe to the chassis is also a subject that has been discussed here many times. I will agree with you that the majority of body builders know very little about mounting a subframe for an off road scenario. Many that I have been told about say they have been mounting truck bodies for years and that they know what they are doing, but I would argue that their skill sets and experience are normally based around vehicles that travel primarily on the highway, not on uneven terrain.

A solution might be to design the subframe yourself, from information you find here, and then get a fabricator to make it, assuming that you are not planning to build it yourself.

I will continue to look through the threads for the answers I need, thank you for the subframe suggestion
 

Amk22

New member
I do not want to be rude, but have you searched this forum for answers to your questions?
I am pretty sure that everything you are asking about has been covered in detail already.

Questions like "what type of material should I build the subframe from" really comes down to what you want to do with the camper and how much money you want to spend. As I mentioned previously, working with steel is normally easier than working with aluminium. How to mount the subframe to the chassis is also a subject that has been discussed here many times. I will agree with you that the majority of body builders know very little about mounting a subframe for an off road scenario. Many that I have been told about say they have been mounting truck bodies for years and that they know what they are doing, but I would argue that their skill sets and experience are normally based around vehicles that travel primarily on the highway, not on uneven terrain.

A solution might be to design the subframe yourself, from information you find here, and then get a fabricator to make it, assuming that you are not planning to build it yourself.

I will continue to look through the threads for the answers I need, thank you for the subframe suggestion
 

dlh62c

Explorer
Focus your resources on the body build. Suspension mods and a SRW conversion can come later.

Keep in mind these trucks were designed to haul freight. Adding weight on the chassis will smooth out the ride. In the mean time, you can try reducing the tire pressures. Set the rears at 35 psi each and the fronts at 60 psi.
 
Last edited:

steve4wdaus

4WDaus "tralia"
Hi Amk22
Our Amesz I believe was built on a Galvanised Steel frame with an aluminium shell. It has been very study and a quality job. I am told the stresses on the body were better handled through this type of design. I have also been told, designs like the SLR Adventurer that close in the sides may cause heat issues with running gear like gear box and diffs. Hope that helps a little, look forward to seeing the progress of your build.
Regards
Steve
 

SkiFreak

Crazy Person
I have also been told, designs like the SLR Adventurer that close in the sides may cause heat issues with running gear like gear box and diffs.

If this was a problem I do not think that ATW would have designed their Global Warrior as they have.
 

dlh62c

Explorer
Focus your resources on the body build....

Make sure you have vehicle insurance sorted out before you start as these trucks carry a commercial rating. Unless the truck doesn't move during the effort and you can get by having a un-plated vehicle in your driveway, you'll need to source some.

All states are different, but in my state you can't get a vehicle re-certified as an RV based on your INTENT to do so. The vehicle has to meet items on a checklist. Vehicle RV certification inspections are performed at a State Highway Patrol inspection station.
 

Amk22

New member
Do people here think its worth the effort to mount the frame with four spring mounts or just use the standard U bolts to mount. We met a guy who built a house truck on an Izuzu, and just used the U bolts. He hasn't had any issues, but is also not driving it on dirt roads etc as much as we plan on doing. Have been reading a lot of different opinions about this particular question, and wondering what you all would do. Thank you
 

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