I have 2 big Chevy 1 ton SWB trucks with 10" lifts and 38.5 and 39.5 Swampers. The 4 wheeling that I do is extremely challenging (muddy, steep up and down, etc.--no rocks yet). These trucks are my daily drivers. They have 350s (RV cams), 3 speed auto trannies and 5.13:1 gear ratios. I now have a parttime NP203 in the Blazer and a tired NP208 in the Shortbed. Is the Gen 2 Doubler viable for (these) daily drivers? My round trip to work is less than an hour, and I would definitely want to err on the side of 4WD prowess. Trucks have major upgrades--check 'em out at <A target="_blank" HREF=http://www.bigerik.coloradoK5.com>http://www.bigerik.coloradoK5.com</A>.