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Things were going so smooth, right up untill !!!!!!!

Typically we call something a shear break when it has opposing forces in a more direct line, like a pin through a D ring being sheared from the side. Which your shock so far outboard, you actually had the impact absorption outside of the theoretical shear point. Since they were both on the same side as the break point, it wouldn't be considered a shear. If the shock were also inside of the line where it broke I would call that a shear. However, being the shock was outside of where it broke it should of put that area more under a tension combined with a bending moment . And if you were on the brakes when it happened it could also be a torsional break, which typically produces an angled fracture across the tube. However, you also have a leaf spring adding additional forces inside of the break point. This would add a bending moment.

I believe since the brace stopped at such an abrupt point, it created a stress riser right at the area where the truss was welded to the tube. It was supported inside of there from bending up, but not outside of there. A high stress area can crack, and once it cracks it's pretty easy to propagate that crack and break the whole thing off.

Now, it doesn't really matter whether it was shear, tension, torsion, or bending. What matters is the next brace includes the inner C to avoid the high stress area on the housing. Then next time if you break it, it will likely be a ball joint or something outside of the housing.
 
folkenheath said:
Typically we call something a shear break when it has opposing forces in a more direct line, like a pin through a D ring being sheared from the side. Which your shock so far outboard, you actually had the impact absorption outside of the theoretical shear point. Since they were both on the same side as the break point, it wouldn't be considered a shear. If the shock were also inside of the line where it broke I would call that a shear. However, being the shock was outside of where it broke it should of put that area more under a tension combined with a bending moment . And if you were on the brakes when it happened it could also be a torsional break, which typically produces an angled fracture across the tube. However, you also have a leaf spring adding additional forces inside of the break point. This would add a bending moment.

I believe since the brace stopped at such an abrupt point, it created a stress riser right at the area where the truss was welded to the tube. It was supported inside of there from bending up, but not outside of there. A high stress area can crack, and once it cracks it's pretty easy to propagate that crack and break the whole thing off.

Now, it doesn't really matter whether it was shear, tension, torsion, or bending. What matters is the next brace includes the inner C to avoid the high stress area on the housing. Then next time if you break it, it will likely be a ball joint or something outside of the housing.
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Well however it broke It was a 1 punch knock out, unless you count the 7 or 8 years of gut wrenching punches it has taken over those years. To the C's I got ya
 
I’m pretty sure it was said the 3/4 ton axle tubes were 1/2 inch in some applications. The use of earlier 67-70 dana 44 closed knuckle axles I’m not sure will fit all your parts correctly. With the closed knuckle joint you’d have to look and see how the inner c sized up with the outer drum knuckle to see if it is the same. I know they sell kits to change from drum to disk on earlier axle, but not sure if they just use the later axle parts from the spindle out or not.
 
chulisohombre said:
I’m pretty sure it was said the 3/4 ton axle tubes were 1/2 inch in some applications. The use of earlier 67-70 dana 44 closed knuckle axles I’m not sure will fit all your parts correctly. With the closed knuckle joint you’d have to look and see how the inner c sized up with the outer drum knuckle to see if it is the same. I know they sell kits to change from drum to disk on earlier axle, but not sure if they just use the later axle parts from the spindle out or not.
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Ya that 1st diff I looked at was a closed knuckle and I decided to not get that one, I've got a 2nd one on the back burner
 
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