The LB7-LLY 5 speed tapshifter gives you the ability to "tap-down" gears or to limit the advance of shifts like with the LBZ-LMM 6 speed trannys. It uses an OEM gearshifter, thats been reshaped to fit like your stock shifter. Pretty slick setup and has saved my butt on occasion. It is also up-gradeable to be alli-locker equipped to give you the ability to manually lock and un-lock your TC.