Comanches were available in either two or four-wheel-drive, with solid axles front and rear (two-wheel-drive Comanches used a simple beam axle with otherwise the same front suspension as four-wheel-drive models). Transfer cases were built by New Process Gear, and the Comanche was available with either part-time "Command-Trac" or full-time "Selec-Trac" systems. In 1986 Command-Trac transfer cases were model NP207 and Selec-Trac were NP228, both with a 2.61:1 low gear ratios. In 1987 the NP207 was replaced with the NP231 and NP228 was replaced with the NP242, both with 2.72:1 low gears. These remained the same through the rest of the Comanche's production.