Not really strange...
If the speedometer is down, radio, cruise control an BC got no speedsignal...
The same if the speedometer have a intern loose connection.
It's all about the speedometer, some part in there are sensible to warmth, maybe some (or just one) electrolytic capacitor, but which?
When the slaughter of my silvern V8 is over, I go ahead to check this problem on my own V8, maybe I find something.
