Did your wheel alignment go out of whack? And changing the shaft, did it stop the knocking noise. Also, does anyone know if after replacing this part, in the future the part will fail again and same symptoms will come up? Wheel alignment has never been adjusted. There was a very slight shake at the wheel at 110kph which I haven't noticed since it was fixed. Knocking has gone. Fwiw, the young bloke in spares said the shafts were victim of a manufacturing fault, so the logical assumption is they fixed them when they made new ones. However, as I'm often heard to say at work.."never assume". I don't really know the answer. Time will tell I s'pose. Awesome, thanks for that. Can't wait to get mine changed. :D edit: I should ask, did you notice any difference in steering? Did steering become more heavy/lighter stay the same? Reading through here someone said that after theres was changed there steering became heavier? Steering has always been fine. No change noticed by me....just the low speed clunk.