Yesterday the '5 made a pop while accelerating and quit on me about a half mile from the house. I coasted her to the shoulder and tried to restart her. Nothin' doing. The better half brought my truck down, and I flat towed the '5 home ( trans and xfer in neutral). Tested the coil at home and it tested bad. Replaced it and the jeep fired right up. Dropped her off the tow bar to put her in the garage only to find she would not motivate. The xfer case seems fine, and it seems to go into all positions. The trans seems to work through the gears, but when I place it in gear, there is no resistance. She rolls just as if she were in neutral. I pulled the trans cover and there is no obvious damage. Anyone have an idea where to start trouble shooting this one?