The tranny is HUGE.
I agree the tranny is large, and at first when I saw it, I was thinking..... why did they design such a huge trans? Then I realized the benefit: No humongous spur gear. Without the huge gear reduction from the typical pinion-spur combo, they had to add additional gear reductions (probably 2 or 3 in series) in order to get the gearing down.
I think the advantage is you won't get dirt or small rocks in the spur gear and you won't be stripping out the spur gear or pinion.
The thing I don't like about this is flexibility. With a spur and pinion combo, simply change the gears for a very wide arrangement of gear ratios. I don't know how the Venom trans can accommodate gearing, but for sure it will involve a near complete disassembly of the transmission in order to change gearing, and even then, I am sure the gearing options are far limited compared to the Axial transmission.
Changing the gear ratio of an Axial trans only requires a couple steps and can be done in under a minute.
BigMike