One problem related to automatic transmission cooler has been reported for the 1996 Chevrolet Astro. The most recently reported issues are listed below.
I was driving down the interstate at 65 miles per hr. And all of a sudden I saw white smoke coming from the back of my van, it looked like the van was on fire, I lost all power to the van, and had no pick-up or speed. I had to divert the van to the shoulder of the highway. When I looked under the hood I found that the transmission cable had come unattached, and I had transmission fluid all over the ground. There were no warning signs whatsoever. Transmission fluid sprayed all the way to my back windshield of the van.