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Grant-o-vations Building something crazy? Trying something totally out of the box? Post it here. Lets see what all those wacky minds are doing out there. These posts should be somewhat technical in nature, but dont necessarily have to be 4x4 related.

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Old 01-11-2015, 01:46 PM   #1
samwe
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Default Trans to diff with no drive shaft?

I am looking at rearranging the drive train in my Muskeg. You can see some pics here: http://www.alaska4x4network.com/showthread.php?t=57972

We put the engine in the back, but now want to put it in the front.

I am wondering if I could connect the transmission directly to the gear reducer box in the rear.

Since the box is not moving in relation to the transmission it seems like this might be OK, but i might be over looking something. Maybe the movement in the mounts would be too much. If so is there some other coupler I could use?
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Old 01-11-2015, 03:06 PM   #2
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Default Re: Trans to diff with no drive shaft?

the motor moves, you need a flex coupler of some sort.
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Old 01-11-2015, 03:53 PM   #3
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Default Re: Trans to diff with no drive shaft?

Loveless coupler?
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Old 01-11-2015, 04:03 PM   #4
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Default Re: Trans to diff with no drive shaft?

Lovejoy coupler?
Stuff is going to heat up and cool off, and you don't want to overload the thrust bearings as stuff shrinks and expands. A lovejoy or a slip-yoke mini driveshaft is what you need.
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Old 01-11-2015, 05:35 PM   #5
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Default Re: Trans to diff with no drive shaft?

It was a suggestion. Not sure how a ? Got in there. Was supposed to be a .
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Old 01-11-2015, 06:08 PM   #6
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Default Re: Trans to diff with no drive shaft?

Will need a pretty big lovejoy to handle the power, which is feasible, but they are not cheap.

http://www.lovejoy-inc.com/products/...s/cj-type.aspx

Do you have enough room to just use a short driveshaft?
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Old 01-11-2015, 07:31 PM   #7
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Default Re: Trans to diff with no drive shaft?

We were planning on using the slip yoke at least so I am not worried about thrust bearings.
As we move the engine forward it has to go up to clear the diff, and then we have to tilt the engine more for u-joints to not bind.
Maybe someone wants to trade a GM Atlas 4 or 5 cylinder for our 6?
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Old 01-11-2015, 08:18 PM   #8
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Default Re: Trans to diff with no drive shaft?

What about raise the output above the input and do a chain drive?
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Old 01-11-2015, 10:21 PM   #9
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Default Re: Trans to diff with no drive shaft?

I can raise the whole box up. I an even move it back.
hmm... More thinking.
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Old 01-11-2015, 11:02 PM   #10
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Default Re: Trans to diff with no drive shaft?

Cheetah. They had IRS and no drive shaft, just a single U-joint.
I could do that and hard mount the engine and trans. I won't notice the vibrations on this.
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Old 01-11-2015, 11:32 PM   #11
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Default Re: Trans to diff with no drive shaft?

I would say move the V-drive back and put a real drive shaft in. Keep the engine/trans rubber mounted. Hard mounted power train never works out great. I realize the tube is pretty solid but the vibrations will be horrible and only get worse with time. Especially with a steel cab. You can get a shaft down to really short with a slip yoke. My center shaft i just built for my divorce on the 6x6 was just under 12" and it could have been even shorter.
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Old 01-12-2015, 01:01 PM   #12
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Default Re: Trans to diff with no drive shaft?

Or use a landrover/rangerover style rubber flex coupling.
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Old 01-12-2015, 04:50 PM   #13
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Default Re: Trans to diff with no drive shaft?

How hard would it be to get yokes to do that? We would need slip yoke to fit a 4L60E and I am sure the speed reducer has some standard splines of some sort.
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Old 01-12-2015, 05:39 PM   #14
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Default Re: Trans to diff with no drive shaft?

Would something like a transaxle work? Never tried to work anything like your track toy. But i know a few guys in the sand feed their rails with 600+horse with paddles. Personally I think that'd handle a toy like yours.
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Old 01-13-2015, 11:31 AM   #15
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Default Re: Trans to diff with no drive shaft?

I would think some precision cutting and welding would be involved. But dont think it would be anything excessive or difficult. machine ears off slip yoke and weld plate on. Same on other side. or round stock across where the u-joint would ride with holes drilled and tapped for bolts. or studs welded on. several ways of doing it I think.
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Old 01-13-2015, 11:52 AM   #16
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Default Re: Trans to diff with no drive shaft?

Im sure you could make it work many different ways. Just ask yourself the old question. when you break down in the middle of no where, what do you want to be telling your buddy or wife over the phone to pick up? custom built adapters or special order yokes for a special order rubber coupler, or over the counter parts you can get anywhere. I guess it depends on where you will be taking the rig and what will it be used for.

On another note, i always kinda liked track rigs but never had one, dad had one for a few years. I Always thought a 400 horse small block and a auto in a track rig would be a blast. Probably break a lot of sh$t.
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