hi all,my freelander 1 2lt xedi has had the rear drivers side cv joint changed and new diff oil,but now on full lock left and right,im getting a rumbling/clunking noise,i was told i had to wear the new part in,could sumone help me on this,thankyou

A CV joint doesn't need wearing in. Did they fit a genuine LR drive shaft? Cheaper after market shafts can be junk, giving all sorts of vibration. Has the VCU been tested? If it's stiff, it can cause similar symptoms.