Can you please show the exact pt-table-sync command you used. Do you have new password hash on both i.e. master and slave ? Can you please show us the output as below:
master-mysql> SHOW GLOBAL VARIABLES LIKE ‘%password%’;
master-mysql> select user, host, length(password) from mysql.user where user=‘myadmin’;
slave-mysql> select user, host, length(password) from mysql.user where user=‘myadmin’;
slave-mysql> SHOW GLOBAL VARIABLES LIKE ‘%password%’;
The solution is probably to use new hashes on master and slave…