I would like to hear more.
Is the newer G56 is the revise down to the left?
Yes, the REVERSE (lol) is down to the left.
As for those with questions about the G56, the only problem I have heard is that the input shaft bearing seat is machined into the aluminum housing and then the bearing is pressed in.
This is a poor design and leads to the bearing seat going out of round (oblong) when using your truck as a career tow rig.
Peter at South Bend Clutch has told me he has seen G56's have this happen at 80K miles, and was suprised mine was still ok at 180K when I had my SBC 3250 DD put in.
I haul RV trailers and have 230K on mine.
I guess I have just been lucky so far, but the time is coming.
It is getting harder and harder to shift each day, and sometimes when taking off while towing one of the heavier trailers, it feels like something is out of round or wobbling.
It gets worse the heavier I tow, but the heaviest I have towed to date is a 15,000# portable restroom trailer.
So please watch out, it may be better than an NV5600, but it is VERY far from bullet proof.
**edit** If my tranny goes south, I will seriously consider the Eaton Fuller swap mentioned in this thread