Manual Transmission & Clutch Workshop Manuals
Workshop manuals for various models of manual transmissions fitted to the io/Pinin (and other MMC vehicles) - I did have a quick look to see if these are already uploaded but don't think they are (Glen feel free to delete if they're duplicates)
22d looks to have the most relevant info.
low
Now I dont really know shit about transmissions, but it kinda looks like the low range gear from the V5M21-9 (triton) gear box might fit our cars (V5M21-A), which is a lower ratio.... Keep in mind that I came to that conclusion by looking at the pretty pictures...