Re: transmission getting to hot
i assume your in aust!
a tranny cooler will always help! no matter what trans or application.
Now...did you have it serviced by the person that fitted it? if so, and there are issues, then it is a possible warrantly claim. If he fitted/rebuilt it, and is now recommending a cooler, then the cost of any repair will be on him. He should have reccomended the cooler in writing at time of fitment.
Like i said earlier, i presume its a 4 speed. the correct oil for these (TQ-95) is brown in colour and smells burnt from the bottle, and cannot be used as a guage to tranny condition. It is important in the 4 speeds to use the correct oil. If they have used dexron III in a 4 speed i am surprised it has lasted 2000k dexron II won't do half that.