I have a Toyota Vios 2003. There is a knock in gear change when it is changing to the over drive gear (OD gear). When the "OD is off" the knock does happen. Once this is switched on there is this knock in the gear change . I changed the transmission oil also. but it did not sort my problem. Is this a common problem for Vios models? Can I get this repaired? From where can I this get repaired? can Toyota Lanka detect the problem and sort this out?