Haven't had time to search threads - sorry - I'm on vacation with wife and kids. Yesterday my wife shut engine off with transmission in reverse, then jammed it into park with engine off. Today, I did a hard acceleration into traffic and suddenly LC coasts to a stop with the sound of gears grinding. I've tried shifting into low range, hi range, fwd, reverse, etc. with engine on and off. The only way she'll move is with the center diff locked.. This is an unmodified 2007 with full time 4wd and center diff lock, approx 160k miles. I've owned since new. All maintenance is up to date including full synthetic fluids 6months ago. I'm several hours from home... Can I drive it at highway speeds with diff locked? Any ideas on what's happening? Do I need a tow truck? Thanks in advance for your help.