Intermittent wheel slip slide indicationat the rear DT car. ~~~~~ 3551 Intermittent wheel slip slide indication.  3551 ER D/L & found FC 322/324. Replaced tacho 1 - Done. Security check - OK. Depot shunting & no wheel slip/slide reoccurrence.    ER D/L after rectification, no wheel slip/slide registered - OK. 3551 Tachogen 1 S/N : OLD : 0022080 NEW : 994039  Aminur/Ridzuan 44072