There were a lot of threads last year about this, I was hoping we got ours late enough that we didn't have to deal with the "bad batch" but check this out.
Camping World has the parts on order, should be replaced in the next week or two.
How many towing miles on your rig? What kind of roads and how heavy? How long have you owned your 2011 RV? I have no comments, only questions, not much help I know, but curious if I need to look out for this or not.
They had a "bad batch" and if you've purchased recently you shouldn't see the issue. If you do they're quick to send you replacements. They even covered the labor since I paid to have them installed originally.
We put about 3500 miles on the equalizers; 3200 of that was our trip from CA to Yellowstone and back. The worst roads I encountered were all in CA. The trailer's about 12k lbs loaded up ready to camp.
We bought the trailer in Oct of 2010 but put the EZ Flex equalizers on in Jan of 2012. They started showing the cracks in less than 6 months. If you have some from the "bad batch" you'll know pretty quickly.