Thanks, i have checked the above link but atually its giving detailed reasons of gear sounds.
I replaced the gear with the kabli one but still sound is there, although it is reduced by 70% approx. New caltex gear oil of 90No was poured in the gear, and subsequently after observing the gear sound, a bottle of SPT oil was also poured in teh gear to enhance the thickness of the gear oil.
Kabli dealer is agreed to replace the gear again and i may go again this week for the job.
Liqui moly has some gear oil additive of RS 500 (name i dont remember), which as they say, will eliminate the gear sound. WHat do you say, should i go for teh same ORRR any other idea.