The thing that sucks most about the issue is that it is very inconsistent... But... If you are taking it to a shop to show them what is wrong, DON'T shut off the motor... Let it run, because if you shut it off, chances are the VX won't show the symptoms when you start it up again. I had that happen twice before I left the thing running, ran in and got the tech and had him ride with me to feel the slam-shifting. But, again, chances are the tech won't know what it is anyway. My rule-of-thumb is, replace the cheap stuff first before going for the guts of the tranny. Check your symptoms against all those that have been reported on this site. Watch for dash gear indicator light anomalies. The replacement Mode Switch is only about $150ish... and is a do-it-yourself replacement. I hope this all helps.