Just a couple of general comments. Those U-bolts are not exactly precision pieces, and just a slight difference in the shape, radius of the bend, thickness of the flat part etc. could throw things a few eighths off when tightening them to a round, cast surface. I would bet it's a combination of the things that HH mentioned.
Quote:
i also tested my tightening torque side to side and they are roughly the same
In a situation like this, a torque wrench might not tell you the whole truth. You could have all kinds of binding between the U-bolt and the axle housing on one side, and little or none on the other.
Tightening each side in gradual, even increments may give a different result than tightening--or even snugging up--one side first and then the other. When all else fails, one last thing to try... swap sides with 'em.
My
![](https://packardinfo.com/xoops/html/uploads/smil457a67e5d52da.gif)
and probably worth twice that in today's market.
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