Stevie: with a problem like that and seeing how close the tolerances are in the newer motors, i think you're looking at pulling the motor and checking everything for dirt and debris!
(esconder) Mantenha a sua Caixa de Mensagens limpa, Arquivando mensagens importantes e usando regularmente a opção "Apagar TODAS as Mensagens". (pauloaguia) (mostrar todas as dicas)