@HardHat.
Thanks for the info. As per VVTI's advice I called PitStop and inquired on a full ATF change. Gonna go get it done first and then check whether the problem persists. As of today it has decreased by a BIG percentage. So am seriously wondering whether it is something serious or just a case of the AT warning me to get a fluid change as it hasn't been done in quite a while!(the A*W dude said it looks like more than 60K kms)
Thanks all for the advice. I intend to follow: unless you suggest I get the slush box/ filters checked first
1. ATF change at PitStop. Cost Rs7,000- (pls advice if A*W is a better option)
2. If problem doesn't stop completely - MiniAce's contact, Mr Hemachangdra, asked me to come in for a test drive and check up
Thanks again for all the advice and info and help!