How can i fix my Defy Automaid 600 Model DAW355?

My machine cannot take a full load anymore.If i load one towel it would do its full cycle no problem.If i load two towels it attempts to turn the drum in the washing cycle.The drum moves slightly either way..The rest like spinning(even with a full load) has no problems.Its only 6 years old.I removed and stripped motor and found no problem.Any help much appreciated.