super easy install,regular tools plus dial caliper to measure clearance,torque wrench,and some way to hold third while retorquing ring gear and caps.went offroading for a test saturday. locked the hubs 4low and walked over stuff that used to be a challenge .more effort to turn but then there a lockrite up front too now .put it in 2 low and walked up the same trail that used to be very difficult in 4wd without lockers .the same trails i could not pass in stock 4x4 i can now do in 2wd.the single most effective modification you can do.total cost 243 bucks ebay,plus gear oil 12 bucks and maybe 3 1/2 hours.absolutley best bang for your buck ..