The left hand thread design must work, mine have never come loose.not to talk smack ,but to me there are millions upon millions of cars on the road that have right hand threads on all 4 wheels and they too have never come loose,so go figure, after all i dont know when they switched, but they did for some reason or another,maybe cost?
like i said not trying to start anything i just feel that it is amazing they did that while all other car makers were using right hand threads,and like dave said young pups seem to just go and shear the stud right off, and in some cases they dont have a replacement, so you have to go with out and order a new , i feel that they should be taken out any way because they are 35 plus years how many cycles has the metal gone through? alot,they will break not if but when, i would change those things out asap! sorry for the ramble i have had some night mares with shops with those pieces of crap!
hate em!