Check that coolant hasn't leaked on the AYC computer which is located ontop of the centre tunnel directly below the heater core, look next to the footrest in the foot well and pull the carpet to one side and the computer will be bolted to the floor, look for signs of water on it. Also the IV is prone to troubles with the rear diff/AYC system that may also need to be checked.
The oil types are :
for the bottle in the boot: MITSUBISHI GENUINE DIA QUEEN ATF-SPII
for the AYC half of the diff: MITSUBISHI GENUINE DIA QUEEN AYC FLUID
228.6 atwkw (308 hpatw) --> 12.5 @ 111.20mph
260awkw (350 whp) --> 11.797 @ 118.60mph