Well lads ! I removed the rear discs to check the bearings were ok and after puuting everything back ie bearing, keyed washer, retaining nut, crown, split pin. Before I put the wheel on there was a bit of play on the disc ? I only hand tightened the retaining nut and I used a new split pin. Should have I used the socket set on the nut before putting a new split pin on ? the bearings looked ok...I even got a second opinion on them, any ideas people.