new to this and computers but will give it a go. own a may 2011 18.57-9. i am the second owner. i bought it in january 2012 from original owner. please keep in mind when i pose my question that it did go around aus before i bought it. i have done approx 1000 kms with it since purchasing it. my last trip i noticed that it was handling different and had a wear pattern developing on a couple of tires(still original set from new).on further investigation it turns out that passenger side rear spring had broken the main leaf. decided to replace rear axle springs an put in greasable shackles so pulled down today to order springs. now here is the question, has anybody else gone thru the alko catalogue and found out that a 6mm 6 leaf spring is rather under rated for the loads that can possibly be encountered in this van also that they only have a listing for 9/16 shackle pins but the springs have 5/8 id bushes..as once load is taken off springs all the skackles have flog in them. i originally thought that it was abuse from around aus trip but on inspection of components the spring has flattened out an free camber is quite reduced from original spec and eye bushes have hardly worn but have considerable slop(and the shackle bolts have negligible wear). i may be wrong but have only started researching tonight and hoping someone here has experience already in this to save me some time, i rang my local jayco dealer and he had no suspension specs on my van but could tell me it would be alko. . i believe my van to be the way it left the factory and after looking at quite a few before buying this one i did notice several that had broken a spring(normally a rear spring and normally the passenger side) or had shackle rubbers replaced and just starting to wonder.any information, thoughts , or opinions would be much appreciated.