The ranger overdrive is very compact. At only 80 pounds, it can easily handle more than 400 lb-ft and has a GvW rating of 25,000 pounds. In addition to overdrive for freeway driving, we'll also be able to split gears for climbing steep grades. Or, since the ranger mounts in front of the t-case, we can use it to drop our Atlas II down from 3.0:1 low range to 2.19:1 for dune driving. technically, the ranger overdrive effectively gives us 16 forward gears and 4 reverse gears.