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post #1 of (permalink) Old 01-05-2001, 11:39 AM Thread Starter
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home made long travel front shaft

ok.. i was in bed last night at about 2 am trying to sleep and this hit me...
take a driveshaft and cut it off so you have only the splines remaining. take another and make it so both ends of the driveshaft are the same...with slip yolks on both ends. take a motorcycle spring, cut it in half, and put half on each end so the shaft stays centered..poof... an 18" slip yolk front driveshaft..ok.. it's not going to be close to balanced, but i really couldn't care less in the front...any ideas/improvementas?? i came up with this cause i have all this stuff laying around...

~~Elusive~~
[img]/wwwthreads_images/icons/tongue.gif[/img]tj-7..tellico tested, uwharrie [img]/wwwthreads_images/icons/tongue.gif[/img]safaried..1 ton drivetrain[img]/wwwthreads_images/icons/tongue.gif[/img]..see it at http://www.jeepgod.net
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post #2 of (permalink) Old 01-05-2001, 12:35 PM
 
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Re: home made long travel front shaft

You need to put some type of limiter on each side to keep one of the sides from pulling out before the other side takes up the additional travel. Sounds doable, for a front anyway.

Jeff
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post #3 of (permalink) Old 01-05-2001, 12:47 PM Thread Starter
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Re: home made long travel front shaft

jeff.. thats what the springs are for.. put them between the shaft and slipyolk on both ends..it will keep the shaft centered..

~~Elusive~~
[img]/wwwthreads_images/icons/tongue.gif[/img]tj-7..tellico tested, uwharrie [img]/wwwthreads_images/icons/tongue.gif[/img]safaried..1 ton drivetrain[img]/wwwthreads_images/icons/tongue.gif[/img]..see it at http://www.jeepgod.net
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post #4 of (permalink) Old 01-05-2001, 01:00 PM
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Re: home made long travel front shaft

I like it! With a little trial and error, it may be a great way to double the slip yoke travel. Let us know how it works if you try it.

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post #5 of (permalink) Old 01-05-2001, 02:00 PM
 
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Re: home made long travel front shaft

It sounds to simple, and that always scares me.
It should work though, provided you dont bugger up one side of the shaft on a rock lathe. I would fear that I would damge one side causing it to slip less readily than the other and the springs would not be enough to ballance them. I am brutal on front drive shafts in the rocks, I paint them before runs so I can see how bad I place them on rocks durring the day, They usually look like a barber poll after the first obstacle. I dont have any problems sepARATting, my front 10" slip slpine with my set up. It does seem like a very plausible design though,... just do it. Ill be there in the spring to tow you out of the tough spots if/when it fails(big grin).

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post #6 of (permalink) Old 01-05-2001, 03:45 PM
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Re: home made long travel front shaft

i dont think that will give you a whole lot of travel.. those stock splines arent that long.. and with the springs keeping it centered.. then you are basically doubling the amount of travel from which is inside the slip yokes.. 3" on each side would give you 6" of travel.. ...mmmm.. so if each side was say 6".. you would get per say 12" of travel.. 6 in and 6 out.. but i dont think the splines are that long.. would have to look at the one of many extras i got layin' around here..

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post #7 of (permalink) Old 01-05-2001, 04:26 PM Thread Starter
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Re: home made long travel front shaft

they are pretty close to 6" each.... 12" of travel is worth trying for....

~~Elusive~~
[img]/wwwthreads_images/icons/tongue.gif[/img]tj-7..tellico tested, uwharrie [img]/wwwthreads_images/icons/tongue.gif[/img]safaried..1 ton drivetrain[img]/wwwthreads_images/icons/tongue.gif[/img]..see it at http://www.jeepgod.net
oh yeah, and a 2000 tj,lift..etc
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post #8 of (permalink) Old 01-05-2001, 05:21 PM
 
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Re: home made long travel front shaft

have yall seen the emergency spare shaft on Pirate bbs?
its 2 inch square tubing inside of 2.5 square tubing, strong as heck, and as much travel as you want.

I think thats an awsome idea for cheap trail spare shaft!


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post #9 of (permalink) Old 01-05-2001, 05:40 PM
 
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Re: home made long travel front shaft

One way to get extreme travel driveshafts, is to use tractor pto shafts. A friend of mine has it on his highly modified yj. He just bought the inner and outer shafts and adapted them to his yokes. It gives him 24in of travel[img]/wwwthreads_images/icons/laugh.gif[/img] is it strong? the shafts are for 400hp tractors! Two seasons with 36' swampers and a lead foot,and everything is still attached[img]/wwwthreads_images/icons/smile.gif[/img].

Ben

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post #10 of (permalink) Old 01-05-2001, 06:00 PM
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Re: home made long travel front shaft

So a front driveshaft doesn't have to be ballanced like the rear? Or would an unbalanced shaft be only for slow moving trail rigs?




Jason

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