I emailed torque king, they have some gear related content on YouTube for roxors, and this is the response I got. First paragraph is regarding the v1 and v4 transmission. Second is transfer case
Jesse was working on the t case low gearing when Covid hit and that threw a monkey wrench in his plans with machining and parts availability. It’s been tabled since then but he has talked about maybe looking into it once again. I think his concentration lately is on trans and t case upgrades to fix weak links.
Brennan Metcalf was working on a gear set as well.
I was going to attempt to make an adapter to do to a 300 but haven't put in the time yet. The rear driveshaft is already pretty short. I don't know how realistic it is without stretching the wheel base a bit.