I have just done a mod on my live axle car to stop the half shafts moving in the bearings. This may be the clonk you can hear when cornering. The bearing is retained in its housing, but there is nothing retaining the half shaft, the hub stops it moving in, but the only thing stopping it moving out on an Ital axle is a ridged area (26mm od) on the shaft which is approximately 15mm further inboard from where the bearing should be. Consequently the shaft, which is retained purely by the interference fit between itself anf the inner race of the bearing, can move by 15mm when under high cornering forces.
My mod was to machine collars which then press up behind the bearing, trapping it between the collar and hub. So far so good, trackday at Oulton tomorrow will tell. PS the new collars meant changing the seals to ones with a larger id - 30mm. Further info should appear in Low Flying.
Hubcap