Why did Chrysler stop making the aspen?

Poor sales.

As a previous owner of a Dodge Aspen I can tell you why. It was far and away the absolute worse automobile I ever owned. I bought it brand new and owned it for 3 months. In those 3 months the radio had to be replaced, transmission was replaced, A/C had to be repaired, oil pan gasket had to be replaced, & Power Steering pump had to be replaced. But the final straw was that the car did not track straight. They never could repair that problem. I traded it off with around 1,500 miles on the odometer. It spent more time in the shop than at my home. I know other people who had similar if not as severe problems with their Aspen.