Jay's Web - Scans from a factory repair manual on the Dana 20 transfer case. Includes disassembly and repair instructions, exploded diagrams and photos - (Hits:1274, Details)
Klune-V - Marlin Crawler underdrive gearbox that bolts in place between the transmission and transfer case. We call it "extreme," because the underdrive multiplies your existing gear reduction by up to 4 times, rather than a usual underdrive of 1.2 times - (Hits:756, Details)
http://www.klunev.com/marlin_intro_article.htm
ClassicBroncos.com - Mating up a Dodge 203 t-case to your stock Dana 20 Bronco transfer case to get a 2.0 doubler effect for extra low gearing. - (Hits:694, Details)