Just got the bad news, transfer case is shot. Was making a whining noise. Don't know how much this should cost to replace, or if I can get a used one, don't know how much to rebuild.2003 x 4x4. Any advice?

Used TX10 cases are pretty cheap. Check your local GY, salvage places, fleabay. Seen them for ~100 locally.

Thanks, found one really cheap with a 12 month 12,000 miles guarantee. This gives me time to do the differential fluids and trans. tune-up. Got 140,000 miles on it, hope to get another 140!