I'm not sure how many people have had their front differentials apart, but I have. I saw how the locker works which is basically just a small round sleeve with small teeth that slides over small teeth over the axle when you pull on the cable lever. Not very stout in my opinion. So I agree with the others, if you can go without, I would try and do that as much as possible in just 4WD until you actually need to engage the locker....
-2011 Polaris RZR-4 800 (SOLD)
-1999 Polaris Sportsman 500 ATV
-2006 AC Prowler 650XT (SOLD)-- updated bevel gears, updated oil pump driven gear, 4 wheel disc brakes, line lock E-brake, Papa Slap clutch, Xentec HID's, Dynatek CDI, Warn skid plates, Intellitronix gauges, 2010 intake/cvt duct work and dust shield, RZR seats, Bestop folding windshield, full cab kit, rear cage and rear seats (4 seater)