this is problem,which i think ,from what i read on this and other sites,although not affecting hundreds of locos,is more inconvenint ;)ive had gear probs as well with usa nw9 locos,but the dealer handed over 4 axles,for both motor blocks no problem!as i said,if i get the axle from bachmann,i will change it over,these locos are to good ,as once the g/box is checked loctite,it will be fine,and can keep its k27 mate happy,in mid december,it will be here!!!!thanks again for the help,repls,peter in auzzie..