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Is a Square-Tube driveshaft safe for rear of trail-only truck?

Discussion in 'The Garage' started by OffRoad, Sep 26, 2006.

  1. OffRoad

    OffRoad 1/2 ton status

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    hey guys,

    i've got a little sammy (don't knock em till ya try em:wink1: ) that is gonna be trail only. it's got a regular driveshaft now, but if that goes... is it safe to make a square tube one for wheeling?

    i want to do square tube for both cause when you spoa a sammy you've gotta put in the 1" spacer front and rear. if i made new driveshafts, i wouldn't need the spacer.

    is this a good idea or not?:confused:
     
  2. marv_springer

    marv_springer 1/2 ton status

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    Yes!.... Last trip I broke my rear CV shaft (round) and had to drive back to trailer on the front [ ] one.... No problems - sides a little noise - up to ~ 40 mph.

    Marv
     
  3. OffRoad

    OffRoad 1/2 ton status

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    thanks, did you have problem making yours? any hints or tips?
     
  4. 1979jimmy350

    1979jimmy350 1/2 ton status

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    make sure you keep it well greesed up, you might even want to add some greese fittings so you can keep it greesed up
     
  5. marv_springer

    marv_springer 1/2 ton status

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    Well.... this is a controversial issue...

    I actually prefer to keep mine dry. I think thick grease will collect more grime/dirt and do more harm than good. At least for the rocks this is the case.... I guess I'd add some graphite if I had some.... :crazy:

    As far as tips, just try to engage things as good as you can so you keep things straight. I kept ~ 6" of round tube engaged inside the [ ] tube and just welded around it.
    [​IMG]
    Marv
     
  6. 1985_K5_Silverado

    1985_K5_Silverado 1/2 ton status

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    Why not make new shafts, but out of conventional round driveshaft tubing?
     
  7. marv_springer

    marv_springer 1/2 ton status

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    1985,

    The square ones are incredibly tough! Las weekend I high centered my rig ON the front d-shaft, front tires in the air, touched the gas pedal and the whole rig moved sideways going "clunk, clunk..." as the flats of the shaft hit the rock! And also you can get some ridiculous "slip" lengths out of the [ ] shaft.

    Marv
     
  8. 85mudblazin

    85mudblazin 1/2 ton status

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    Yep what Marv said.

    I run them in mine front and rear. They are super strong and cheap.
     
  9. pauly383

    pauly383 Daddy383 Staff Member Moderator

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    BTW , a Sammi will fit in the back of a longbed k20 :pimp:
     
  10. 85 Jimmy

    85 Jimmy Sheepdog Premium Member

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    i see this alot in trail only vehicles, but how good of an idea would it be for a DD/weekend trail rig?


    sorry to hijack
     
  11. muddybuddy

    muddybuddy 3/4 ton status

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    i would think in a street driven truck at high speeds it would cause terrible vibs, maybe if its balanced?? im not sure u can balance them though. at most i would think you could get away with a square front shaft since its not engaged all the time
     
  12. OffRoad

    OffRoad 1/2 ton status

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    1, thanks for all the encouragement. i'm doing this when the time comes.

    2. marv--- what kind of little buggy thing is that you're driving?

    3. i should use reciever tube right? what size?

    4. i'll put grease fitting on it. i live on the east coast. east coast = mud and water. and that equals mud and water in the driveshaft. if i put some grease in there it'll give the driveshaft something to slide on besides mud. :laugh:

    5. should the male end be on top or on bottom? (please note: i'm looking for both a real answer, AND a dirty answer here, so be creative.):haha:
     
  13. marv_springer

    marv_springer 1/2 ton status

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    ....wha..... :dunno: ... You've never seen the "Marvzda"?!
    [​IMG]
    [​IMG]

    I won't continue to hi-jack your thread, but you can read up on it if you search for "Beetle" or "Marvzda"

    Yes. The big [ ] is 2.5x.25" wall. The small one can be 2"x.25" or 2"x.120 wall.

    :waytogo:

    I'll try to maintain my clean reputation here and just say that I asked the female to go on top - and she did.:laugh:

    Marv
     
    Last edited: Sep 26, 2006
  14. az-k5

    az-k5 1/2 ton status

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    There is a local machinist guy (Andrew - 77chevyk10) who runs front and rear square. It was a DD for a little over a year that way. He did 70+ down the freeway. The trick was in centering it perfectly.
     

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