hey guys i would like to ask a query , i noticed a sound in my car which was unusual because my car is has no issues what so ever anyways went to the mechanic and ask him to check it but it was no sound when he checked it since than sound comes every now and than and than dissapear once i caught the sound in mechanic presense and he said its coming from my gear box which could be few reasons a ) sound coming from thuss bearing b) any bearing is not tight anyways so make sure that this is the right assumption i went to another mechanic and he said it happens u need to change your gear oil and put heavy oil stmp or something he said and the sound will go bear in mind i recently change the gear oil now before attempting any step i would like experts opinions about it thanks in advance and any good mechanic near f.b area would be appreciated if any one knows .
regards
syed