I own a 200 series (td) and the aisin box in the diesels are not the same as the dmax, yes they are both aisin but the diesel 200 has a 6 speed box, the petrol 200 series have the 5 speed aisin so I guess that would b the same as dmax
I just bought a auto dmax so I am able to compare both, the auto in the dmax is not bad, it shifts smoother than my parents 2009 triton and 2006 hilux, the 200 is in another league tho! ithe dmax auto drops down gears on downhill sections when braking is applied leading to harder braking than you anticipate, I guess I will get used to it. It wants to get into top gear as soon as possible too, at 60km/hr it is borderline on labouring, again something I will get used to, but coming from a manual 1999 hilux it bugs me. Sometimes I think I should of got a manual but because I tow lots a auto is way better for my needs
Overall the auto is pretty good, manual mode is exactly that and it will shift back to first if you stop too
Having had many problems with manual boxes in the past I think autos are a better long term propersition unlike manuals (eg dual mass flywheel issues, synchros goin, premature clutch plate wear etc) it seems the manual 4wd gearbox has not advanced in design as much as a auto
Cheers