needed a bit of work done on my 2010 407 2.0 hdi . 2 x cv boots, 1 x cv joint, 2 x skf frip/ bottom ball joints. topped gearbox oil with 1 litre 75w/80 . all sorted and back on the road. new tyres( goodyear) with noise rating of 68. jobs all done at the same time. now I have a noisy car when driving. on some roads it is quieter than on other roads. front end seems tight enough with steering spot on. doesn't seem like wheel bearings as noise doesn't alter when cornering. suspension seems a bit noisy on rough tarmac. tried swapping tyres from rear, they made it worse. cannot get my head around it. different people telling me different things. bottom hub bush, intermediate driveshaft bearing etc. help please, its doing my head in.