My car doesn't unload the rear spring. I do have helper springs but they aren't really needed. I thought that the clunk was the spring becoming unseated but it was the strut moving up and down in the carrier. I put some urethane shims in the bottom of the carrier and they are fine, although I have to replace them once a year. Tony said he could fix them, but he wanted to charge me, plus down time for the car plus shipping...so...Seems like everything wrong with the AWRs - which Tony has been aware of - he can fix for a fee. That's really my only gripe with them, he hasn't fixed the known problems in nearly 6 years of producing them. One of these days I will have a ring machined for the base of the strut.