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Thread: Axle cut and turn angles

  1. #1

    Default Axle cut and turn angles

    I am in the middle of a cut and turn on the dana 44 out of my '79 terra. I was going off a thread from some forum from a long time ago and I seem to have lost the link. Does anyone know about how many degrees to turn the knuckles and the spring perches to get the right caster and driveline angle?
    I think it's about 3*-5* on the caster and like 10*-12* on the pinion but I'm not sure. Please correct me if i'm wrong, any help would be appreciated.

  2. #2
    Join Date
    Mar 2009
    Location
    chatt, tn
    Posts
    13

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    we turned mine 7 and set the pinoin at 10 works great
    ---LESS WEIGHT= LESS BROKEN PARTS---

  3. #3

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    Thank you. Now I have the confidence to proceed with the project.

  4. #4
    Join Date
    Mar 2009
    Posts
    1

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    I rotated my knuckles 5*. I've never agreed w/ rotating the pinion. My thoughts have always been that the proper driveline efficiency is obtained by matching the pinion angle to the motor/trans angle. The motor angle doesn't change when you lift it so the pinion angle wouldn't change either. The shaft would be at a different angle but that's not the important thing. Just another view point. I'm basing my knowledge off of racecars not 4x4's so maybe someone has a good arguement for changing it for scouts.

  5. #5
    Join Date
    Feb 2009
    Location
    Aiken, SC
    Posts
    2,423

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    Quote Originally Posted by sab7896 View Post
    I rotated my knuckles 5*. I've never agreed w/ rotating the pinion. My thoughts have always been that the proper driveline efficiency is obtained by matching the pinion angle to the motor/trans angle. The motor angle doesn't change when you lift it so the pinion angle wouldn't change either. The shaft would be at a different angle but that's not the important thing. Just another view point. I'm basing my knowledge off of racecars not 4x4's so maybe someone has a good arguement for changing it for scouts.
    On the rear driveshaft, that's a reasonable point of view, but on the front, there is less concern about vibration than there is about stress and expansion/contraction of the shaft length. This is all about the speeds involved. Equal and opposite is better for the street, but excessive u-joint angle can be worse on the trail.
    Allan E.
    Curmudgeon Extraordinaire
    Charter Member, Old Hippie IH Club
    Old fashioned binder freak

  6. #6

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    I did a spring over and had pretty bad driveline angle but it was managable. Then I cut the bed off and shortened the frame which moved the rear up 21". Some how along the way I ended up with bad driveline bind and started eating U-joints, the yokes on the transfercase side were hitting eachother. I made a different trans crossmember and dropped the t/c down 2-1/2" and it didn't help all that much, so here I am, turning my pinion, among a long list of other things.

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