My speedometer works fine usually, but lately it likes to stick around the 40 to 60 mph range. Banging on the top of dash worked for a while but no more. I believe that it may be mechanical. It's not the end of the world as most everything else seems to be working. Just a nuisance. The wipers have never worked on delay since I got the van 2 years ago. Ignition switch was replaced and diagnostics run by local shop but they found nothing. I have read this is fairly common and may need the motor replaced. I have a 2000 Dodge Ram 4x4 also and the wipers work just fine. Any suggestions would be appreciated. I believe most problems with most vehicles today are electronic in nature. From what I have read, the whole cluster might need to be replaced and I ain't gonna do that, I will live with it. The wiper switch was replaced and still no delay worky.