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Behind the auto tranny, we installed an Inchworm Prerunner adapter to turn the 2WD output into a 4WD-style output. That is followed by a 2.28:1 Toyota gear reduction box, then a 3:1 Atlas II transfer case. We thought long and hard about how we wanted to configure this drivetrain. The drivetrain we chose was pricey and required a lot of sheetmetal rework of the cab floor. But, it offers a great combination of gearing options to cover highway, fire roads, and washes, and then on down to slow speeds for crawling over the rocks. With the gearing choices we also benefit from effective compression braking on steep ascents. The Atlas makes a bit of gear noise through the shifter, but that’s to be expected from the heavy-duty gears.