As per my experience, santro gear is not hard. Check from Gear specialist. May be your clutch cylinder is causing issue and not creating required pressure
@pwuser15249819485
Bhai, seems u have gone to mad mechanic. Don't go again to that mechanic.
Bhai, my family 71 model Corolla has overhauled 7 times in 40 years and now 8th is awaiting. there is some lil. financial issue otherwise 8th one bhee ho he jata
It should be your choice,your budget that what u want: Swap or Again Overhaul
Swapping is lil. bit complex job involving several Technical issues as well as Legal issues like u will have to endorse new engine numbers and remove old engine numbers from Registration office etc.
If u r agree to take these headaches then go ahead for Swap job