MTUH3 Spring Update

[MTUH3]

So as many of you know at this point, my rear leaf spring broke at the front eye.



I took what was left of the spring eye (still attached to the bushing) to the material lab at work. At this point the spring is too corroded to give up its ghosts yet. Looking at the spalling and other areas, it has been broken for many months. Which means this crack has been here a while. Why did it crack? No smoking gun at this point, but I won't give in yet. Heat treating is still a possible cause. Wish I would have taken this in sooner, but I have been distracted.

 

[atvspeed4]

Sounds like your crack in the spring is identical to mine. Funny thing is for onroad driving you would never know it was cracked. When you flex the h3, thats when the spring pops off of the eye. From the amount of rust on the broken leaf it appears that mine was broken for a while but it finally came off when I took it offroad.

 

[MTUH3]

I think you will need to nearly fully extend the spring for it to come undone. What I don't know if I could have even seen it during pre run inspection. Did it crack from the bushing out, or from the bottom of the spring. Based on the corrosion I see, looks like the oldest part of the cracks went from the bushing out