I know that the 5 speed tansmission in the Vibes is the same as the 5 speed in Corollas, the flywheel, clutch, pressure plate, etc should be the same also, if that would make it easier to find parts in Singapore. In the interior of the vehicle, the console that the shifter is mounted on/in is the same, but the shift controls are different, and also the top trim of that console. Typically automatic transmissions have a single control cable from the shifter to the transmission, manual transimssions have two cables. THere is a pic of my shifter assembly in
http://forums.genvibe.com/zerothread?id=5923 . ragingfish had some pics of his auto shifter assembly there also, but the links are bad, and I've asked him for an update I don't know if the Voltz/Vibe shifter is the same as in any other car that may be available where you are.It does seem like the parts needed to do the change could get to be expensive, but then again, would that give you the only manual transmission Voltz? That would make yours truly unique.The engine computer, sometimes called an ECU or PCM, may also have a different program in it between automataic and manual transmission models. It controls shift points in an automatic to some extent, but I guess it is possible that the same computer could work with either transmission. Maye someone could check the part numberr for the ECU for a manual and automatic, if they are the same part number, then that would save you some money.I also do not know if the drive axles are the same between the two models, they probably should be, but there might be some small length difference to account for the different transmissions. Again, perhaps a part number lookup could check to see if the part numbers are the same or different for the different transmission models.