[RdRmr]

Brewkiller,
First of all welcome to the forum. Second thing is "YES" I would have those Equa-Flex units checked. Take a look in my profile and check the albums. Had those same units. Brought my unit home new and same as you, creaking and popping while backing. Didn't pay much attention to it at first but over time it got worse. Both were cracked on the top where you can't see it unless you look really close. Check your bushings as well, are they plastic or brass? Replaced them with the Dexter E-Z flex system with wet bolts, eleven thousand miles this summer and not a sound. I waited too long before calling Keystone so the repair was on me, wasn't a big deal or that hard. Happy Campin.