You guys seen this yet? Its a TX10 to dana 300 doubler kit in development by Northwest Fab:
Transfercase Doubler

It will work on any Nissan using the TX10 transfer case. It'll be one more way to get crawler gears.





With the stock TX10 and dana 300 gears, one would have the option of running in 1:1 (high range in both boxes), 2.02:1 (low range in TX10, high range in d300), 2.6:1 (high range in tx10, low range in d300), or 5.25:1 (low range in both).

With crawler gears in one case or the other, you could have insane crawl ratios:

Calmini Gears in TX10:
1:1, 2.6:1, 3.92:1, or 10.19:1

d300 4:1 gears in the dana 300:
1:1, 2.02:1, 4.00:1, or 8.08:1

Here's a link to the company working on this.. keep an eye on it, as this will probably be the next hot mod for these trucks:
http://www.northwestfab.com/