I did so with 39-inch tires, a 500hp big-block, three transmission ... NP203/NP205 doubler setup, with four gear ratios (1:1, 1.96:1, 2.01:1, 3.94:1). I could have just swapped in the 4L80E ...

By adapting the low-range gearbox section of an NP203 transfer case to the face of the ever-popular NP205 ... to a modern overdrive transmission, like we were with a 4L80E, things become a ...