Hey admin , thanks for your input. I tried your method . Initial observations are as follows-
1. Car jerks/knocks in 3rd gear at about 35km/h , rpm would be 1500 or less , with or without A/C.
2.Overall performance has increased.
3.When I engage first gear , the moment I used to release the clutch there used to be shuddering with or without A/C. Now that shuddering has gone.