a manual transmission does not circulate the trans fluid like an auto, so you do not need a trans cooler. adding one would be more expensive then buying a new transmission.
i think you can get a radiator with an oil cooler, or just add one, that im not too sure about. you could also most likely buy an auto radiator, and use what should be used to cool the auto trans fluid as an oil cooler, or just add a dedicated oil cooler.
check ebay.
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