U joints vs. pinion strength

Discussion in '40- & 55-Series Tech' started by B2BER, Nov 11, 2005.

  1. B2BER

    B2BER

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    So I'm installing a Dana 300 in my 40, and and my head's spinning on what to do for driveshafts. I currently have 4 speed style shafts, and 79 axles with fine spline pinions. My original plan was to get some custom flanges from Tom Woods or High Angle for the T-case to mate up to the driveshafts. Now I'm starting to think I might just s***can that idea and get some domestic style junk yard shafts from a fullsize truck, since I might need a CV on the rear anyways.
    So what I'm wondering is what u joint size, 1310,1330,1350, is comparable in strength to Cruiser fine spline pinions? I've been searching on the net and everything that involves 1350's is about 1/3 more expensive than 1310 or 1330. I can't really see as far as driveshafts go, paying more for 1350 stuff if the pinions are only so strong. What do you guys think?
     
  2. Degnol

    Degnol

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    Depends on which end you want to let go first. I would rather have the pinion end 'splode rather than the TC output end. It can become a polevault. So, I would use the weaker u joint on the pinion end. Just the opposite on the front.

    JMO


    Ed
     
  3. Mace

    Mace rock scientist.. Staff Member s-Moderator

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    I would use toyota stuff. Stronger than 1310 and more angularity..

    Jesse at Highangle among others has D300 Toy flanges..
     
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