I just got a 96 jimmy that I am concerned about the transmission. When you start it, the transmission works, it will pick up all the gears and shift normally for about 2 minutes. Then all the gears go out. No first and no reverse at all. If you sit and wait about an hour it will work again but it slipps then does not work at all. It you let it sit overnight it will work again for the 2 minutes. The previous owner told me that the jimmy had randomly died a few times on them but always restarted. All the wires are connected. The Jimmy was well maintained and a 1owner unit. It has 140K miles and is an automatic with 4wd. Any help would be great.. Thanks.