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Old 05-01-2020, 09:23 PM
unfinished unfinished is offline
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Default Mutvee (Homemade UTV) Project

Hi folks,

Posting about a project of mine, still in early stages, that I've been working on, a homemade utv. I'm calling it a mutvee (mutv/multipurpose utv).

The idea is to take a pair of narrowed front truck axles and use a VW 1.6 diesel (50ish HP) along with 5spd VW transaxle. The result is a 4wd and 4ws, heavy utility vehicle that will be more work oriented rather than go fast (Inspiration comes from Bobcat toolcat, Kubota RTV and the like). Expected top speed to be around 20-30mph due to gearing. Can be flat towed simply by unlocking all four hubs and using a tow bar. Uses standard 16" truck rims and tires. Plans for a 4x5 dump bed on it. Air bags for suspension, to allow for adjustability for loads. All pieced together from stuff laying around or craigslist finds, with a few things ordered online. It will be 5 feet wide, 7 foot wheelbase, and around 10 foot long overall. Probably end up around 2500-3000 lbs final weight.

I would welcome feedback as I continue working on it.
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  #2  
Old 05-01-2020, 09:31 PM
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Pics????
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Old 05-01-2020, 09:36 PM
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This is sorta how I envisioned it. Its only been partly drawn up just to get idea of placement of parts. Rest is being engineered on the fly.
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Old 05-01-2020, 09:58 PM
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The truck axles are from 80's Chevy K20. Just your ordinary 10 bolt axle that happen to have 8 lugs for which I have bunch of 8x6.5 wheels laying around. Other benefit of the k20 axles is the heavy wall axle tubes.

I narrowed it and used two factory short axles (instead of the short and long axles). Both 10 bolts themselvers were around 100 ea. Used short axles from ebay were 60 each irc. One has a locker (traclok I think) in it and I will use that as the rear axle in the mutvee. The other axle is open diff. Narrowing it, results in approx 60" width measuring to outside of tires (235/85/r16). I ended up putting larger tires, now its around 62" wide.

I did not cut straight through the tube but rather made a half lap type deal. Just clamped a piece of angle for alignment. Don't know if that was really needed.
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Last edited by unfinished; 05-01-2020 at 11:24 PM.
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  #5  
Old 05-01-2020, 10:09 PM
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Lower frame is 3x3" tubing. You can see how narrow the axles are now. The tires have since changed to larger 285/75/16 tires that I found on craigslist.
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  #6  
Old 05-01-2020, 10:14 PM
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Upper frame/cage is 2x2 tubing from a gym set. Thats why some of the tubing is perforated with holes. I tried to place the holes towards the interior since it will have a roof and eventually doors.
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Old 05-01-2020, 10:14 PM
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I toyed with an idea like this for a while but never got beyond the daydreaming phase. I think it would be a blast to build one.

My thought was to use a truck axle as a center differential and jeep axles front and rear, and drive the pinion of the truck axle with a small hydraulic motor. The double gear reduction would let you use a small displacement motor, and you'd have all wheel drive with forward and reverse with only one motor and valve/circuit. If you used a front axle for the center differential, it would already have CV joints on each end and you'd just have to figure out how to mate them up to the splines on the other two pinions.

I never really worked out what to do for the suspension and all that, but it's an idea that has stuck in my head for a long time.
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Old 05-01-2020, 10:30 PM
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The engine is a Volkswagen 1.6 normally aspirated diesel from a 80's Rabbit. Got whole car for 300, pulled what i wanted and scrapped the rest.

It currently has the 5 speed transaxle from the rabbit. I'm debating putting in a 5 speed transaxle from a MKIV Jetta, which I also have. Reason I would like to swap, is the later model has a cable shifter greatly simplifying the shifter set up. The old transaxle has levers and linkages to do gear changes. The newer transaxle is also a bit stronger, but probably does not matter due to gearing in the axles.

Its going to sit in the middle of the chassis between the driver and passenger. Obviously there will be a cover and guards for safety.
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Old 05-01-2020, 10:40 PM
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Thats about all the pictures I have. I admit I started this a long time ago, but due to job change I should be able to have more time to work on it. Next step is to get rolling chassis with the air bag mounts installed. So I can at least roll it in and out of the garage.

The plan is to use Cat2 tractor links for the suspension arms with 1" diameter pins. I know these are widely derided in the off road crowd. My thoughts are its cheap and its going to be low speed. If it is problematic, I can always swap in heims.
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Last edited by unfinished; 05-01-2020 at 11:13 PM.
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  #10  
Old 05-01-2020, 10:55 PM
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@Matt Shade yeah that sounds great too, what are you waiting for... I also have some jeep axles on a rusty cj3a frame that was someone elses project, I considered using those but the form factor wasn't what i wanted. And kinda wanted four wheel steering just for cool factor.
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