Congrats on the new Jeep. You have a part time t-case so 4x4 should not be used on dry pavement or you runa high risk of breaking something in your t-case. In snow I usually use 2wd until it gets pretty bad and then use 4x4 hi. That way you can shift back to 2wd when you hit some dry pavement. Use 4lo only when it's really bad and you don't want to go more than 20 mph. You also have to slow down to less than 5mph to shift into or out of low range. Enjoy the snow!
99 XJ Sport - The Green Lantern: 4.0/AX-15/NP231/HP30/C8.25, 3" RC lift, 30's Hella 500FF's, removable front doors.
'75 CJ5 - The Clockwork Orange: Chevy 305/T90/D18
'91 XJ Laredo - The Grizzly Bomber: (trail rig) 4.0/AW4/NP242/HP30/D35, 2"BB 31's
'91 XJ Briarwood - The Spruce Moose (Club Project)