Mini tractor trailer drivetrain question

Jstew

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Hi all, brand new to the forum stuff but looks like a great place to collaborate!
I’m in the design process on a mini big rig for my son and my grandfather-in-law. I want to be as true as I can to a tractor trailer with dual rear axles and gears!!
Couple routes I can go but looking for suggestions..... ideally it does not matter vertical shaft or horizontal shaft motor, I would like to do a cable/manual clutch, 3-5 speed trans with reverse, and a diff with dual rear axles. Ultimately I can just go traditional Briggs and centrifugal clutch or torque a verter, but I was trying to shoot for the stars on this one.
Now for the part I would like some input on lol..... I can’t seem to find a good manual clutch or a decent multi gear trans w/ reverse. I was trying to stay away from the Frankenstein junkyard route because if I ever build another one I would like to have a parts list, drawings, etc.....
It would be great if they still made those old cub rears or something similar to a wheelhorse rear that could take a little abuse. For this application I could do the belt clutch in on a tensioner, lawn mower style.
Any input, ideas, or redirects to other posts would be awesome.
I’ll be sure to share and update my projects to help others and to keep the mechanical minds alive in today’s times!
Thank all!
 

firemanjim

Just kartin' around....
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:welcome2:
I like your idea.... I'm using a 200cc ATV engine manual 4 speed with reverse for my go kart. I would look for a ATV engine on eBay from a Honda or something like that , that is a semi automatic with reverse so it's easier to shift gears..... And you get the benefit of having an alternator and electric start.....
Do you plan on driving both rear axles or just the front ? Rear suspension?
 

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Jstew

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I like that idea! I’ll check around on eBay tonight!Plan is to have axle 1 on a diff and individual chain drives on each side to run the axle 2. Axle 2 will be pretty much a shaft mount with a bearing and a wheel. I’m trying to keep suspension easy.... leaf spring like a small trailer. Etrailer has a few nice options that I think I will use.
 
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