We drove home our HO/Aisin Mega dually on memorial day weekend from Seattle WA down to SoCal.
The drive was absolutely flawless and surprisingly comfortable being a DRW (truck has oem rear air bags).
Ive owned a 68rfe truck (2016 cummins 2500) and now this 2021 Aisin. The new truck, although significantly heavier, is OBVSIOULY more powerful. Rolling full-throttle pulls are very impressive to put it nicely. From a stop, if i hammer it, all 4 rear tires are clawing for traction and on the brink of breaking loose.. this is not an exageration. Granted the truck has 4.10s but damn... it has a SH1T ton of power!!!
Regarding the Aisin.. It has been an absolute joy. All this talk of "id rather daily a 68rfe" is pure nonsense and completely made up fairy tale. This new truck drives easily as nice OR NICER at low speeds and part throttle than my 2016 68rfe truck.
The trans logic on both trucks (2016 68rfe and the new truck) are actually quite similar. The 2-3 shift happens a little too soon IMO on this new truck but it behaves exactly as my 68rfe did.
The shifts are NOT harsh or firm to the point of being uncomfortable. Not even close.
From a transmission perspective, to be honest, if you told me my new truck has a 68rfe in it, i'd believe you due to how similarly it drives around town to my 2016 2500.
We have a 9 day 1000+ mile towing trip planned in July, so i'll have some "under load" feedback on this HO/Aisin combo the middle of next month.
GET THE HO/AISIN! Ive been nothing but super impressed all the way around.