What causes dragging on the under carriage?

These kinds of problems really need to be experienced to know what is happening. An experienced mechanic will drive this and be able to tell if this is the brakes dragging, clutch slipping, plugged exhaust or something I'm not even thinking of. Here are some in your area, try to have someone go for a ride to experience this. http://repairpal.com/isuzu-repair-in-wheeling-west-virginia