A gear-driven Dana 20 transfer case with 2.03:1 low range was standard with the manual gearbox (which had a much lower first gear of 6.3:1), while the TH400 automatics received the permanent four-wheel-drive QuadraTrac system. The chain-driven, aluminum QuadraTrac was advanced at the time. It included a vacuum-operated center differential lock. The transfer case was offset, allowing it to sit just above the frame to avoid obstacles, and the chain itself is larger than nearly any other. A test by "Petersen's Complete Book of Four-Wheel Drive" reported that the Cherokee was the only vehicle unable to be dynoed because the transfer case would not allow the rear wheels to spin, unlike the other full-time four-wheel-drive vehicles being tested. In the off-road test, the same held true. This transfer case was also employed successfully in Baja races, for example by Roger Mears in the Baja 1000. A 2.57:1 low range was optional on QuadraTrac.