You should be good with that. I didn't mean to imply that you HAD to use Mitsu fluid, I just hadn't seen any Dextron fluids that met the Diamond SP requirements when I last changed my transmission fluid. I'm glad there's something on the market that does now, because I'm certain it's cheaper than getting the Diamond SP from Mitsu.

95 Montero SR
3.8 MIVEC, Advance headers, 2 1/2" exhaust, Magnaflow muffler, OME shocks & rear springs, 2" body lift, 3" tank lift, 4.90s, TRE front locker, factory rear locker, Roger Brown Rock Sliderz, 315/75r16 (35") tires, Sport big brakes