Manufactured by Teraflex. The TeraFlex TJ/LJ NP231-J 2Low 2WD Low-Range Shift Sector Kit adds a rear 2WD (two-wheel-drive) low-range option to the TJ Wrangler/LJ Wrangler Unlimited NP231-J transfer case�s standard low-range shift pattern. This kit enhances trail turning ability by allowing tighter turns on narrow switchbacks and eliminates most front-end bind encountered with turning with 4WD (four-wheel-drive) engaged. This internal modification does not require any external upgrades. New Shift Pattern: 2H > 4H > N > 4L > 2L Fits: � TJ Wrangler w/ NP231-J transfer case only � LJ Wrangler Unlimited w/ NP231-J transfer case only Install Time: 5 Hours