2000 KENWORTH W900 Structurebodybumpers Problems

KENWORTH HAS A REPUTATION OF PUTTING A CUSTUMER OFF UNTILL WARRANTY IS OUT. ALL OF THESE PROBLEMS WHERE TO BE ADDRESSED. AND THERE ARE MORE. HARD TO EXPLAIN IN SHORT WORDS. I DO HAVE DOCUMENTATION IN THE FORM OF MAINT. FILES WITH DESCRIPTIVE ACCOUNTS OF ALL PROBLEMS , NONE OF WHICH HAVE BEEN ACCURATLY REPAIRED. I'V BEEN INTO VARIOUS SHOPS CONCERNING RR SUSPENSION, RIDE HEIGHT PRB. HAS ALWAYS BEEN THE ISSUE. THIS EFFECTS EVERY ASSPECT OF DRIVEABILITY, AT FIRST WAS THOUGTH TO BE ALLIGNMENT BUT THEN STARTED TO NOTICE SIMILARITIES BETWEEN THE TWO WHEN CONTROL VALVES STARTED LEAKING DOWN, AFTER 15 OR SO TRIPS TO SHOP , I BEGAN TO LEARN ALL I COULD ABOUT IT. AND AFTER 50 OR SO TIMES ADJUSTING MYSELF HAVE FOUND NO REAL SOLLUTION. THIS HAS BEEN A PROBLEM EVER SINCE THE TRUCK WAS NEW AND IS ON THE TOP OF MY LIST BECAUSE NOT...