Well after learning it really was the transmission I just watched the Tahoe drive away - after a week of no interest on craigslist one of the kids my son works with offered me $200 for it - I guess he needs a car and his dad is mechanically inclined so I just let them have it - They will probably get it running and lift it, add 37" tires... hope they do!
Sort of sad, that car has been to Yellowstone, The Tetons, MOAB, Arches, Sand Dunes, Grand Canyon, Montana, South / North Dakota & 100+ ski trips through the Colorado snow, I put 150K of the 250K miles on it....