Woke up with this idea. Simple farmer fix approach for now, just blocking it out.
Instead of centering the extra mount move it down to the hydraulic fitting just for good measure and run some channel iron between the rack mount at the aluminum over to a rigid thru bolt and extra clamp. An OEM bush could be used or a metal sleeve for less movement.
I used a 5/8 socket laying around for a spacer to line the two up, since that was what was handy at the time.
I show it set off to the side of the bolt hole showing how it could be connected to the frame cross member just like I did for the center. Huh?? Lined up in the second shot with the hole.
Simple, easy garage fix without welding or special tools, cheaper than a rack! A cave man could do it!
Then either poly bushings or metal spacers in the OEM rack mount point there on the aluminum housing. That may stabilize and prevent if from separating. I don't know but it could still break somehow but would not seperate?
I'm not sure but we might want just some wiggle room to allow for some shock absorption?
Just had a news flash in my head. Scarry huh?
How many of you that are having problems with keeping things tight, that have not tried grinding the bracket and mating surface, are running 315 tires and have been since your original tires.