Rock climber
That reply makes no since. Your worried about poly causing your control arm brackets to tear off. Hmmm the bolt on world must be full of cheap shit.
Maybe I need to read my reply again or maybe you do either way one of us is not seeing straight
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i *think* he means that poly bushings will transfer more force to the mount than a heim joint. But not 100% sure./..
correct.
this is why
More importantly bushings need to flex in all 3 dimensions "x-y-z", only a flex-joint provides that!
the OEM arms were designed to twist down the length of the arm, that is why they are the shape that they are, but its also why they get destroyed offroad.
when you replace them with a more solid arms to prevent trail damage, you take away the arms ability to twist. you then ask the arm to do all of that.
this causes rubber bushings to fail prematurely, as the bonded sleeve is now trying to pull itself away from the bushing every time the axle articulates.
so you replace the rubber bushings with poly bushings... great? not really. the poly bushings are stronger by far than the rubber bushings, but they also transfer nearly all of that twisting motion to the CA mounts.
the stock stamped sheet metal mounts will tear off
I have seen it a number of times. super common in XJs and TJs (they share the same design)
ultimately a set of LCA skids and some gussets can prevent this, but you still have the inherrent problem of you are trying to twist something that doesn't want to be twisted.
IMO the currie johnny joint is the best of all worlds here.
They have plenty of "flex" in them to handle even the most extreme suspensions, and they have a very good amount of NVH absorbtion.
not to mention they are rebuildable for very little. and the likelyhood of a housing or ball failing is next to none.