Its been a long time i drove qualis long distance and update of this thread.
Sold my Innova last 10 days before. Now started using qualis regularly.
Steering box leak was there for some time and planned to overhaul the steering box. In Coimbatore its around 4500 to 6000 based on the conditions with one year warranty.
AC is good even i havent taken the car for long time. Throughout this year, its done 500 to 600 kms only. New battery replaced and tyres replaced with Bridgestone last year.
Finally opened the gearbox and replaced 5th gear and shaft related bearings. The one asoociated with the fifth gear is the needle one which is not available in the Spares store in coimbatore.
Some bearings were worn and today it will be planned to fit in the car.
Let me try whether the sound is completely gone or partially still available.