TC feedback Front DT car 'B1' train doors when opening and closing at CBR NB platform making unusualnoise. Staff (BBT) check and feedback train doors were slow in opening and closing and emitting mechanical noise during  ~~~~~ TC feedback Front DT car 'B1' train door     Roller replaced done on the above mention car #3610-B1 door (LHS).Security check and door static test several times ok. Check and test push/pull resistant,mating strip,DLS,DLD and DCS ok. Done by Saini/Haslan.  07/11/22